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Colorado Minerals!


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Siderite on Galena from Julia Fisk Mine, Leadville District, Lake County, Colorado [./colorado712/co712b61a.JPG] Siderite on Galena from Julia Fisk Mine, Leadville District, Lake County, Colorado [./colorado712/co712b61b.JPG] Siderite on Galena from Julia Fisk Mine, Leadville District, Lake County, Colorado [./colorado712/co712b61c.JPG] Siderite on Galena from Julia Fisk Mine, Leadville District, Lake County, Colorado [./colorado712/co712b61d.JPG]


No. CO712B61 - $ 325.00

Siderite on Galena

Locality: Julia Fisk Mine, Leadville District, Lake County, Colorado

Specimen Size: 9.1 x 4.7 x 2.3 cm (small cabinet)
Largest Crystal: 1.6 cm


ex.  George Robertson


From the collection of well-known Colorado mineral collector, George Robertson. My dad traded this piece from George in the early 1980s. The piece features dozens of “rosettes” of tan Siderite which are sitting atop rather lustrous, well-formed, cuboctahedra of Galena on Sphalerite and Pyrite matrix. The Julia Fisk Mine is one of the more notable specimen producing mines in the Leadville District, especially since it was one of the few Leadville mines to produce Rhodochrosite. A great representation from the Julia Fisk Mine, and worthwhile for any Colorado collector to add to their collection. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

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Pyrite from Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado [./colorado712/co712b62a.JPG] Pyrite from Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado [./colorado712/co712b62b.JPG] Pyrite from Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado [./colorado712/co712b62c.JPG] Pyrite from Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado [./colorado712/co712b62d.JPG] Pyrite from Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado [./colorado712/co712b62e.JPG]


No. CO712B62 - SOLD

Pyrite

Locality: Cord Mine (Silver Cord Mine), Iron Hill, Alicante, Leadville District, Lake County, Colorado

Specimen Size: 7.0 x 4.6 x 4.1 cm (small cabinet)
Largest Crystal: 1.7 cm across


ex.  Hal Miller and Ed McDole


One of the best Pyrite specimens that I’ve handled from the Cord Mine. Such great crystallization with well-defined, sharp, lustrous, bright, metallic striated pyritohedra with only very minimal edge-wear. The largest crystal is predominantly set on the main focal point of the specimen. Very few of these pieces exist today, and are virtually impossible to find on the market. This piece comes from the collection of noted mineral collector Hal Miller, who in turn had sold it to the famous mineral dealer Ed McDole in Montana in the 1950s. My father later ended up buying the piece from McDole in the early 1970s when he first came to Colorado. Leadville is well known for its Pyrite specimens, and the top pieces from the Moyer Mine are, to me, among the best from the district. Irreplaceable in today’s market, and priced very competitively compared to what I’ve seen from Leadville in other dealers’ inventories.



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Galena on Pyrite from A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado [./colorado712/co712b63a.JPG] Galena on Pyrite from A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado [./colorado712/co712b63b.JPG] Galena on Pyrite from A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado [./colorado712/co712b63c.JPG] Galena on Pyrite from A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado [./colorado712/co712b63d.JPG] Galena on Pyrite from A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado [./colorado712/co712b63e.JPG]


No. CO712B63 - SOLD

Galena on Pyrite

Locality: A. Y. & Minnie Mine, Iron Hill, Leadville, Lake County, Colorado

Specimen Size: 3.6 x 2.5 x 1.7 cm (miniature)
Largest Crystal: 3 mm


A rarely seen Galena specimen from the A. Y. & Minnie (sometimes called just the A. Y. Mine) in Leadville. The piece hosts several sharp, lustrous, silvery colored modified cubic crystals of Galena sitting atop a somewhat stalactitic-shaped growth of Pyrite, and associated with black Sphalerite on the reverse side. Some of the Galena crystals appear to be altering to Cerussite as they have a slight oxidized coating on the exterior. Rarely seen on the market, and would make a nice addition to any Colorado suite as a reference specimen.



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Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65a.JPG] Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65b.JPG] Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65c.JPG] Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65d.JPG] Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65e.JPG] Ferrimolybdite / Molybdite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b65f.JPG]


No. CO712B65 - $ 185.00

Ferrimolybdite / Molybdite

Locality: Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado

Specimen Size: 5.3 x 3.9 x 1.6 cm (small cabinet)


A rarely seen Ferrimolybdite from the famous Climax Mine. This is actually a SIGNIFICANT Molybdenum mine with a very large open pit and some underground tunnels. This specimen hosts soft yellow color semi-powdery crusts of Ferrimolybdite or possibly just Molybdite sitting on "sericite" matrix. “Minerals of Colorado” – 1997 mentions Ferrimolybdite as occurring from Climax, but also states that Ferrimolybdite was formerly referred to as Molybdite and implies that Molybdite is not a valid mineral(!), so obviously there are some inconsistencies in the literature. Nonetheless, this is a great hard to find reference specimen from this classic Colorado locality. The Climax Mine was the largest producer of Molybdenum ore in the United States, and talks of the mine reopening have been going for years, and we would hope to see more of these noteworthy minerals from Climax to make their way back on the market.



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Pyrite with Fluorite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b66a.JPG] Pyrite with Fluorite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b66b.JPG] Pyrite with Fluorite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b66c.JPG] Pyrite with Fluorite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b66d.JPG] Pyrite with Fluorite from Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado [./colorado712/co712b66e.JPG]


No. CO712B66 - $ 50.00

Pyrite with Fluorite

Locality: Climax Mine, Bartlett Mountain, on the summit of Fremont Pass at the top of the Continental Divide, Lake / Summit County Line, Colorado

Specimen Size: 7.6 x 5.7 x 4.3 cm (small cabinet)
Largest Crystal: 1.0 cm


A classic, and sometimes lesser known, yet important locality for Pyrite in Colorado is the Climax Mine. This locality is actually a SIGNIFICANT Molybdenum mine with a very large open pit and some underground tunnels. This specimen hosts a razor sharp, highly lustrous, slightly elongated, golden metallic cube of Pyrite measuring 1.0 cm on edge and is associated with a few smaller Pyrite cubes and beautiful blue-green Fluorite on "sericite" matrix. Despite the slight amount of damage, this is still a nice display specimen from this classic Colorado locality. The Climax Mine was the largest producer of Molybdenum ore in the United States, and talks of the mine reopening have been going for years, and we would hope to see more of these great Pyrites along with other noteworthy minerals from Climax to make their way back on the market.



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Wire Silver from Mollie Gibson Mine, Aspen, Pitkin County, Colorado [./colorado712/co712b67a.JPG] Wire Silver from Mollie Gibson Mine, Aspen, Pitkin County, Colorado [./colorado712/co712b67b.JPG] Wire Silver from Mollie Gibson Mine, Aspen, Pitkin County, Colorado [./colorado712/co712b67c.JPG]


No. CO712B67 - SOLD

Wire Silver

Locality: Mollie Gibson Mine, Aspen, Pitkin County, Colorado

Specimen Size: 1.3 x 0.8 x 0.5 cm (thumbnail)


The Mollie Gibson Mine near Aspen is arguably the most famous Native Silver specimen producing mine from the region. These specimens are some of the most distinctive Silvers from Colorado, and are highly prized amongst collectors. This particular mine was unbelievably rich in Silver, so much so that Josiah Spurr wrote in 1898 that one particular vug in the Mollie Gibson, measuring approximately one to two feet across, was “festooned” with what he called threadlike Silver, and what we more commonly refer to as wire Silver today. It was also noted that gastropod fossils replaced by Native Silver have also been found in this mine, which is one of the very few instances that I know of a native metal replacing organic material underground. This specimen hosts fairly stout, curled wires creating an attractive little thumbnail. If you are a native metal collector, a thumbnail collector or if you like Colorado native elements, don’t miss out on this little beauty.



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Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b68a.JPG] Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b68b.JPG] Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b68c.JPG] Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b68d.JPG]


No. CO712B68 - $ 100.00

Siderite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 3.2 x 2.7 x 1.6 cm (miniature)
Largest Crystal: 1.6 cm


A beautiful cream-beige colored compressed rhomb or “disc” of Siderite proudly sits atop a mound of smaller Siderite crystals which are adorned by small, sparkling Pyrite crystals. The Siderites from this mine are not the typical blocky rhombic habit like those seen from a lot of other ore bodies in Colorado. A beautiful “toenail” sized display specimen from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. They are highly prized among Colorado collectors for their unique form and obvious beauty. The Siderite from this mine ranges in its chemistry from the far iron end to an iron/manganese mix, all the way to bright pink Rhodochrosite at the other end of the series. Good crystallized Siderites from this locality are among the best from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!



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Fluorapatite from Crystal Lode pegmatite, Fulford District, Eagle County, Colorado [./colorado712/co712b69a.JPG] Fluorapatite from Crystal Lode pegmatite, Fulford District, Eagle County, Colorado [./colorado712/co712b69b.JPG] Fluorapatite from Crystal Lode pegmatite, Fulford District, Eagle County, Colorado [./colorado712/co712b69c.JPG] Fluorapatite from Crystal Lode pegmatite, Fulford District, Eagle County, Colorado [./colorado712/co712b69d.JPG]


No. CO712B69 - SOLD

Fluorapatite

Locality: Crystal Lode pegmatite, Fulford District, Eagle County, Colorado

Specimen Size: 2.7 x 2.2 x 2.1 cm (thumbnail)


Apatite is well known from the Fulford District in Colorado, but good specimens are not common, and don’t often leave the state as they are in demand both from dealers and collectors. For all the different mineral environments that exist in Colorado, it's no surprise that there is a pegmatite that produces attractive gemmy yellow Apatite crystals from time to time. This crystal is fairly lustrous on the termination and pyramidal modifying faces. The prism is mostly translucent, notably striated, with textbook hexagonal form. Lastly, and most unusually, the pinacoid features several triangular growth lines creating a very unusual “crop circle”-esque patterning, unlike any I’ve seen in a Fulford Apatite. Complete all the way around, save for the base of the crystal. Very highly representative of this uncommon locale and small find.



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Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b70a.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b70b.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b70c.JPG]


No. CO712B70 - $ 75.00

Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 2.2 x 2.2 x 2.0 cm (thumbnail)


The Eagle mine is probably best known for its pyritohedral Pyrite specimens. This full thumbnail sized specimen is a great display piece of Eagle Mine Pyrite showing typical striated pyritohedra with sharp, very lustrous faces. It’s also nearly a “floater” as there is only a small point of attachment. At one point there were hundreds if not thousands of these specimens available, and they are now seldom seen for sale like most classic minerals from Colorado. This piece would make a great addition to any Colorado mineral suite. Good crystallized Pyrites from this locality are among the best from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant.



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Pyrrhotite with Siderite from 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b71a.JPG] Pyrrhotite with Siderite from 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b71b.JPG]


No. CO712B71 - $ 75.00

Pyrrhotite with Siderite

Locality: 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 3.8 x 2.2 x 2.1 cm (miniature)


ex.  Richard A. Kosnar


A seldom seen specimen of coppery-bronze colored, foliated Pyrrhotite with soft golden colored “discs” of Siderite from the famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine) near Gilman. The piece was collected in the late 1970s. Pyrrhotite is well known from this mine, but not often available on the market. This one is more of a reference specimen than anything else, but if you’ve ever wanted to own a Gilman Pyrrhotite, here’s a good representation that won’t break the bank.

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Sphalerite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b72a.JPG] Sphalerite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b72b.JPG] Sphalerite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b72c.JPG]


No. CO712B72 - $ 125.00

Sphalerite on Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 3.6 x 2.5 x 2.3 cm (miniature)
Largest Sphalerite: 7 mm


A beautiful pair of matched complex, highly modified, deep reddish-black groups of Sphalerite are smartly perched atop a “mound” of HIGHLY lustrous, bright, metallic, golden striated Pyrite pyritohedra. No real damage to speak of on the display side, and very attractive for a smaller Gilman specimen. A beautiful “toenail” sized display specimen from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. Good crystallized sulfides from this locality are among the best from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!

To order this specimen click here




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Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73a.JPG] Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73b.JPG] Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73c.JPG] Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73d.JPG] Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73e.JPG] Rhodochrosite from 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b73f.JPG]


No. CO712B73 - $ 400.00

Rhodochrosite

Locality: 1900’ Level, Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 7.6 x 5.6 x 4.1 cm (small cabinet)
Largest Crystal: 1.5 cm


A beautiful soft pink colored “mound” of compressed rhombohedra or “discs” of Fe-bearing Rhodochrosite are intergrown to make this small cabinet display specimen a superb representation of the material from this famous locality. The Rhodochrosites from this mine are not the typical blocky rhombic habit like those seen from a lot of other ore bodies in Colorado. A beautiful piece from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. They are highly prized among Colorado collectors for their unique form and obvious beauty. The Rhodochrosite from this mine ranges in its chemistry from the far manganese end to an iron / manganese mix, all the way to tan / brown Siderite at the other end of the series. Good crystallized Rhodochrosites from this locality are among the most distinctive from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!

To order this specimen click here




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Rhodochrosite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b74a.JPG] Rhodochrosite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b74b.JPG] Rhodochrosite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b74c.JPG] Rhodochrosite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b74d.JPG]


No. CO712B74 - $ 1600.00

Rhodochrosite on Sphalerite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 6.1 x 4.6 x 3.7 cm (small cabinet)
Largest “Rosette”: 10 mm


ex.  Richard A. Kosnar


Several vibrant pink colored “rosettes” comprising compressed rhombohedra or “discs” of Rhodochrosite are intergrown and gently sprinkled atop beautifully contrasting black Sphalerite matrix to make this small cabinet display specimen a top notch representation of the material from this famous locality. The Rhodochrosites from this mine are not the typical blocky rhombic habit like those seen from a lot of other ore bodies in Colorado, and this particular pocket that produced the fiery pink crystals on the stark black Sphalerite are some of the my favorite Rhodochrosite specimens from Colorado. For reference, there is underlying Pyrite below the Sphalerite, but it cannot be seen from the display side. A beautiful piece from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. They are highly prized among Colorado collectors for their unique form and obvious beauty. You can’t get these pieces anymore, they’re not just available, and only a few truly fine specimens of this material exist. The Rhodochrosite from this mine ranges in its chemistry from the far manganese end to an iron / manganese mix, all the way to tan / brown Siderite at the other end of the series. Good crystallized Rhodochrosites from this locality are among the most distinctive from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!

To order this specimen click here




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Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b75a.JPG] Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b75b.JPG] Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b75c.JPG] Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b75d.JPG]


No. CO712B75 - $ 95.00

Sphalerite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 2.8 x 2.3 x 1.2 cm (thumbnail)
Largest Crystal: 7 mm


A difficult specimen to photograph, but the quality of the Sphalerite crystals on this specimen is better than the vast majority of Sphalerites to come out of the Eagle Mine (more properly the New Jersey Zinc Eagle Mine). Several very sharp, rather lustrous and SMOOTH Spinel-twinned crystals of jet black Sphalerite are intergrown with very minor Siderite “discs” to create this large thumbnail sized display specimen. Were it not for the small Siderites on the side of the piece, I might have a hard time believing it’s from Gilman, but make no mistake, this is a great quality piece from this famous Zinc producer. Better in person, and more than worthwhile for somebody who collects this material. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!

To order this specimen click here




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Sphalerite on Siderite from 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b76a.JPG] Sphalerite on Siderite from 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b76b.JPG] Sphalerite on Siderite from 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b76c.JPG] Sphalerite on Siderite from 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b76d.JPG] Sphalerite on Siderite from 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b76e.JPG]


No. CO712B76 - $ 400.00

Sphalerite on Siderite

Locality: 1700’ Level, Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 10.5 x 7.6 x 2.1 cm (cabinet)
Largest Sphalerite: 8 mm


ex.  Brian Kosnar


From my own personal collection, this cabinet sized display specimen is a quintessential Gilman sulfide / carbonate association piece. Several remarkably sharp AND lustrous crystals of jet black Sphalerite with notably SMOOTH faces – hardly any striations at all on many faces – are gently intermixed and sitting atop a crystallized “plate” of soft beige-cream colored compressed rhombohedra or “discs” of Siderite. The piece was mined in 1978, and I actually received this piece as a gift from my father as a teenager. With only a slight rough spot on one crystal, this specimen is in better condition than most from this mine. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!



To order this specimen click here




(click on the pictures to enlarge)

Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b77a.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b77b.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b77c.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b77d.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b77e.JPG]


No. CO712B77 - $ 365.00

Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 11.2 x 10.7 x 5.3 cm (cabinet)
Largest Crystal: 12 mm


ex.  Robert Batic


The Eagle mine is probably best known for its pyritohedral Pyrite specimens. This cluster is a great display specimen of Eagle Mine Pyrite showing typical striated pyritohedra with sharp, lustrous faces. Some attached dark reddish-brown Sphalerite on the reverse side of the piece can be seen. This piece is markedly three dimensional compared to most Eagle Mine Pyrites, which is a great touch. The largest crystal measures 1.2 cm across, and would make a great addition to any Colorado mineral suite. From the collection of Robert Batic of New Jersey, whose label states that the specimen came from Edwin Skidmore originally. At one point there were hundreds, if not thousands, of these specimens available, and they are now seldom seen for sale like most classic minerals from Colorado.



To order this specimen click here




(click on the pictures to enlarge)

Pyrite “horseshoe” with Siderite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b78a.JPG] Pyrite “horseshoe” with Siderite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b78b.JPG] Pyrite “horseshoe” with Siderite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b78c.JPG] Pyrite “horseshoe” with Siderite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b78d.JPG] Pyrite “horseshoe” with Siderite on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b78e.JPG]


No. CO712B78 - $ 500.00

Pyrite “horseshoe” with Siderite on Sphalerite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 8.1 x 7.3 x 4.2 cm (small cabinet)


The Eagle mine is probably best known for its pyritohedral Pyrite specimens. Here we have a gorgeous display piece featuring a predominant and highly unusual “archway” or “horseshoe”-shaped group of sparkling brilliant golden color Pyrite pyritohedra which are associated with additional Pyrites and sitting amongst remarkably sharp AND lustrous crystals of jet black Sphalerite with notably SMOOTH faces – hardly any striations at all on many faces – are gently intermixed with soft beige-cream colored compressed rhombohedra or “discs” of Siderite. This piece is markedly three dimensional compared to most Eagle Mine Pyrites, which is a great touch. Due to the beautiful shape, amazing aesthetics and wonderful overall quality, it would make a great addition to any Colorado mineral suite. From the collection of Robert Batic of New Jersey, whose label states that the specimen came from Edwin Skidmore originally. At one point there were hundreds, if not thousands, of these specimens available, and they are now seldom seen for sale like most classic minerals from Colorado.



To order this specimen click here




(click on the pictures to enlarge)

Rhodochrosite with Quartz on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b79a.JPG] Rhodochrosite with Quartz on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b79b.JPG] Rhodochrosite with Quartz on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b79c.JPG] Rhodochrosite with Quartz on Sphalerite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b79d.JPG]


No. CO712B79 - $ 350.00

Rhodochrosite with Quartz on Sphalerite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 5.2 x 5.1 x 2.2 cm (small cabinet)
Largest Rhodo: 6 mm


Dozens of soft pink colored “rosettes” comprising compressed rhombohedra or “discs” of Rhodochrosite are intergrown with beautiful white Quartz crystals and gently sprinkled atop contrasting black Sphalerite matrix to make this small cabinet display specimen a great representation of the material from this famous locality. The Rhodochrosites from this mine are not the typical blocky rhombic habit like those seen from a lot of other ore bodies in Colorado, and these particular pieces are some of the my favorite Rhodochrosite specimens from Colorado. For reference, there is underlying Pyrite below the Sphalerite, but it cannot be seen from the display side. The Sphalerite is actually very well-crystallized, and I would say the piece is equally a Sphalerite specimen as it is a Rhodochrosite specimen. A beautiful piece from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. They are highly prized among Colorado collectors for their unique form and obvious beauty. You can’t get these pieces anymore, they’re not just available, and only a few truly fine specimens of this material exist. The Rhodochrosite from this mine ranges in its chemistry from the far manganese end to an iron / manganese mix, all the way to tan / brown Siderite at the other end of the series. Good crystallized Rhodochrosites from this locality are among the most distinctive from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!

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Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b80a.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b80b.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b80c.JPG]


No. CO712B80 - $ 85.00

Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 2.0 x 1.8 x 1.4 cm (thumbnail)


The Eagle mine is probably best known for its pyritohedral Pyrite specimens. This full thumbnail sized specimen is a great display piece of Eagle Mine Pyrite showing typical striated pyritohedra with sharp, lustrous faces. It’s also nearly a “floater” as there is only a small point of attachment, and it is crystallized nearly all the way around. At one point there were hundreds, if not thousands, of these specimens available, and they are now seldom seen for sale like most classic minerals from Colorado. This piece would make a great addition to any Colorado mineral suite. Good crystallized Pyrites from this locality are among the best from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant.



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Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81a.JPG] Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81b.JPG] Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81c.JPG] Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81d.JPG] Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81e.JPG] Ag-bearing Tetrahedrite on Dolomite from 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b81f.JPG]


No. CO712B81 - $ 300.00

Ag-bearing Tetrahedrite on Dolomite

Locality: 28 Drift, 2000’ Level, Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 10.3 x 7.8 x 3.8 cm (cabinet)
Largest Tetrahedrite: 5 mm


A rarely seen specimen of the highly sought after Silver-bearing Tetrahedrite on charmingly contrasting white rhombs of Dolomite measuring up to 1.8 cm from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine) near the ghost town of Gilman. Most of the Tetrahedrite from this locality contains at least some Silver and continues all the way to the other end of the series to Freibergite. This piece is loaded with razor sharp Tetrahedrites that are proficiently sprinkled throughout the equally sharp Dolomite rhombs. A great cabinet sized display specimen of this hard to find material, especially in this quality. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant



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Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82a.JPG] Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82b.JPG] Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82c.JPG] Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82d.JPG] Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82e.JPG] Sphalerite on Siderite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b82f.JPG]


No. CO712B82 - $ 250.00

Sphalerite on Siderite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 6.2 x 3.8 x 3.1 cm (small cabinet)
Largest Sphalerite: 8 mm


ex.  Brian Kosnar


From my own personal collection, this cabinet sized display specimen is a quintessential Gilman sulfide / carbonate association piece. Several remarkably sharp AND lustrous crystals of reddish black Sphalerite with notably SMOOTH faces – hardly any striations at all on many faces – are gently intermixed and sitting atop a crystallized “plate” of soft beige-cream colored compressed rhombohedra or “discs” of Siderite. The piece was mined in 1978, and I actually received this piece as a gift from my father as a teenager. Great shape overall, and in better condition than most from this mine. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!



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(click on the pictures to enlarge)

Barite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b83a.JPG] Barite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b83b.JPG] Barite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b83c.JPG] Barite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b83d.JPG]


No. CO712B83 - $ 600.00

Barite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 7.1 x 6.7 x 2.6 cm (small cabinet)
Largest Crystal: 6 mm


Without out a doubt, one the most popular non-sulfide or non-carbonate species from the Eagle mine are the now hard to find, golden Barite crystals. This piece hosts a few dozen, incredibly glassy, very sharp, well-formed, rich golden color crystals with excellent gemminess / transparency and somewhat blocky form. The overall quality is excellent with no real damage to speak of except for one corner of a crystal on the periphery. You don’t see these anymore, and along with specimens from the Sherman Mine in Leadville, they are the best golden Barites from Colorado. This piece really stands out from most others from the Eagle mine as the crystals formed on contrasting white Quartz, which is not common from this locality. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!



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Chalcopyrite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b84a.JPG] Chalcopyrite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b84b.JPG] Chalcopyrite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b84c.JPG] Chalcopyrite on Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b84d.JPG]


No. CO712B84 - $ 150.00

Chalcopyrite on Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 4.5 x 4.2 x 1.3 cm (miniature)
Largest Crystal: 1.0 cm.


A pair of soft yellow-golden crystals of Chalcopyrite – possibly coating Sphalerite(?) – sitting on a thin “plate” of highly lustrous, razor sharp, metallic, golden cubic Pyrite crystals. The piece is in great shape overall, despite one of the Chalcopyrite crystals being contacted on the back (not visible from the display side). Good crystallized Chalcopyrites from the Eagle Mine are almost impossible to find these days, especially on Pyrite like this piece. A splendid association specimen, from a mine that produced some of Colorado’s best sulfide display specimens outside of the San Juan Mountains. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant!



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(click on the pictures to enlarge)

Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85a.JPG] Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85b.JPG] Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85c.JPG] Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85d.JPG] Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85e.JPG] Rhodochrosite with Fluorapatite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b85f.JPG]


No. CO712B85 - $ 400.00

Rhodochrosite with Fluorapatite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 11.5 x 7.5 x 6.2 cm (cabinet)
Largest Apatite: 8 mm


A VERY hard to find Rhodochrosite and Apatite association specimen from the famous Eagle Mine in Colorado. The famous “rosettes” of Rhodochrosite from the Eagle Mine are amongst the most limited and interesting Rhodos from the state, as there is almost nothing like them from the other major ore bodies in Colorado. The most sought after phosphate species from this mine has to be Apatite, and I can remember seeing only one other specimen with these two minerals together on the same piece from Gilman. Hundreds of beautiful, soft pink colored, compressed rhombohedra or “discs” of Fe-bearing Rhodochrosite surround the soft greenish color tabular crystals of Apatite (measuring up to 8 mm) which are perched upon a sizeable “mound” of crystallized black Sphalerite and soft golden Pyrite to make this cabinet display specimen a superb representation and infrequent association specimen of the material from this famous locality. The Rhodochrosites from this mine are not the typical blocky rhombic habit like those seen from a lot of other ore bodies in Colorado. A beautiful piece from the world famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine). This mine is long defunct and will never produce these specimens again. They are highly prized among Colorado collectors for their unique form and obvious beauty. The Rhodochrosite from this mine ranges in its chemistry from the far manganese end to an iron / manganese mix, all the way to tan / brown Siderite at the other end of the series. Good crystallized Rhodochrosites from this locality are among the most distinctive from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant.



To order this specimen click here




(click on the pictures to enlarge)

Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b86a.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b86b.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b86c.JPG] Pyrite from Eagle Mine, Gilman, Eagle County, Colorado [./colorado712/co712b86d.JPG]


No. CO712B86 - $ 1200.00

Pyrite

Locality: Eagle Mine, Gilman, Eagle County, Colorado

Specimen Size: 20.6 x 11.8 x 5.4 cm (large cabinet)
Largest Crystal: 2.5 cm across


The Eagle mine is probably best known for its pyritohedral Pyrite specimens. This impressive large cabinet specimen is a great display piece of Eagle Mine Pyrite showing typical striated pyritohedra with sharp, very lustrous faces and the typical beautiful soft golden color. At one point there were hundreds, if not thousands, of these specimens available, but rarely in this size, and they are now seldom seen for sale like most classic minerals from Colorado. This piece would make a great addition to any Colorado mineral suite. Good crystallized Pyrites from this locality are among the best from Colorado, and highly sought after by collectors. The Eagle Mine was the center of lead and zinc mining in Colorado for a time, and produced some of the state’s most memorable mineral specimens, along with the neighboring Groundhog Mine that produced the finest Wire Gold specimens in the world extant.



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Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87a.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87b.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87c.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87d.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87e.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87f.JPG] Barite from Crater Creek Barite locality, Crater District, Rio Grande County, Colorado [./colorado712/co712b87g.JPG]


No. CO712B87 - SOLD

Barite

Locality: Crater Creek Barite locality, Crater District, Rio Grande County, Colorado

Specimen Size: 13.2 x 9.1 x 6.8 cm (cabinet)
Largest Crystal: 4.5 cm


One of the better Crater Creek Barite specimens that I know of. I bought the piece years ago from Larry Conklin. For reference, this material is written up in “Minerals of Colorado” – 1997 and the crystals are described as being up to 2 inches(!). The crystals on this specimen are nearly 2 inches and quite aesthetically sitting on the matrix. The crystals, which are tabular in habit with a silvery-grey color and medium luster, are in excellent condition, and show only slight edge-wear, which is remarkable for the size. I believe this is an older specimen, but, unfortunately, it came with no documentation other than Conklin’s label, so I don’t know when it came out of the ground. If you like aesthetic cabinet display specimens from Colorado, look no further.



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Calcite with Malachite and Azurite from Copper Rivet mine, Mesa County, Colorado [./colorado712/co712b88a.JPG] Calcite with Malachite and Azurite from Copper Rivet mine, Mesa County, Colorado [./colorado712/co712b88b.JPG] Calcite with Malachite and Azurite from Copper Rivet mine, Mesa County, Colorado [./colorado712/co712b88c.JPG] Calcite with Malachite and Azurite from Copper Rivet mine, Mesa County, Colorado [./colorado712/co712b88d.JPG] Calcite with Malachite and Azurite from Copper Rivet mine, Mesa County, Colorado [./colorado712/co712b88e.JPG]


No. CO712B88 - $ 500.00

Calcite with Malachite and Azurite

Locality: Copper Rivet mine, Mesa County, Colorado

Specimen Size: 16.8 x 9.7 x 5.7 cm (large cabinet)
Largest Crystal: 4.2 cm


One of the best crystallized Calcites that I have seen from the Copper Rivet Mine, located several miles north of the Cashin Mine, along Slat Creek, west of Highway 141.  This lesser known locality apparently produced some specimens in the late 1990s when a few enterprising individuals were able to liberate pieces in their free time. I haven’t seen many Copper Rivet specimens on the market, and they typically aren’t much to look at, but this piece hosts a 4.2 cm Calcite scalenohedron, which is certainly one of the best Calcite crystals that I have seen from this obscure locale. Minor associated green Malachite and blue Azurite make for a nice touch, and signify the validity of the piece. Don’t miss out on this one, as I feel that there will be no more, I only know of two this nice that came out.



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Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89a.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89b.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89c.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89d.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89e.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b89f.JPG]


No. CO712B89 - $ 300.00

Calcite with Siderite

Locality: Billy Creek Wildlife Refuge, Ouray County, Colorado

Specimen Size: 13.3 x 9.2 x 5.0 cm (cabinet)
Largest Crystal: 1.1 cm


This locality is a bit obscure, but is known to Colorado collectors as it has produced some of the most interesting and easily identifiable Calcites from anywhere in the state. These Calcite crystals occur in septarian nodules found in the Mancos shale formation. As far as I know there are only three reported minerals from the locality – all carbonates, i.e., Calcite, Siderite and Dolomite. In the early 1980s, my father collected several superb specimens from this locality, which he referred to as "Windy Ridge", but the correct name for the locality is Billy Creek. The piece hosts dozens of excellent, sharp, gemmy/translucent, well-formed, classic, colorless to white rhombohedra, with a gorgeous satiny interior. The crystals are associated with tan/pink botryoidal Siderite and are sitting on contrasting gemmy brown scalenohedral Calcite on matrix. The largest Calcite crystal measures 1.1 cm, and almost all of them are virtually damage free. A very attractive and hard to find display specimen that would make a great addition to a Calcite suite or a collection of Colorado minerals.

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Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b90a.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b90b.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b90c.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b90d.JPG] Calcite with Siderite from Billy Creek Wildlife Refuge, Ouray County, Colorado [./colorado712/co712b90e.JPG]


No. CO712B90 - $ 800.00

Calcite with Siderite

Locality: Billy Creek Wildlife Refuge, Ouray County, Colorado

Specimen Size: 13.1 x 6.7 x 3.6 cm (cabinet)
Largest Crystal: 2.5 cm


This locality is a bit obscure, but is known to Colorado collectors as it has produced some of the most interesting and easily identifiable Calcites from anywhere in the state. These Calcite crystals occur in septarian nodules found in the Mancos shale formation. As far as I know there are only three reported minerals from the locality – all carbonates, i.e., Calcite, Siderite and Dolomite. In the early 1980s, my father collected several superb specimens from this locality, which he referred to as "Windy Ridge", but the correct name for the locality is Billy Creek. This piece showcases the largest colorless to white Calcite rhombehedra that I have seen from this locality with excellent, sharp, gemmy/translucent, classic form and a gorgeous satiny interior. The crystals are associated with tan/pink botryoidal Siderite and are sitting on matrix. The largest Calcite crystal measures 2.5 cm, and most of them are virtually damage free. A very attractive and hard to find display specimen that would make a great addition to a Calcite suite or a collection of Colorado minerals.



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Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92a.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92b.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92c.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92d.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92e.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92f.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92g.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92h.JPG] Chalcedony on Smoky Quartz “casts” after Laumontite from Buck Mine, Cripple Creek District, Teller County, Colorado [./colorado712/co712b92i.JPG]


No. CO712B91 - $ 700.00

Chalcedony on Smoky Quartz “casts” after Laumontite

Locality: Buck Mine, Cripple Creek District, Teller County, Colorado

Specimen Size: 13.2 x 10.1 x 8.8 cm (cabinet)


This locality in the Cripple Creek District (purportedly in an old mine shaft) produced unique epimorphs or "casts" of Smoky Quartz and Chalcedony replacing Laumontite. The Smoky Quartz has a distinctive muted silvery-grey color, with very little luster and a somewhat stalactite-esque growth due to the way the Quartz overgrew the preexisting Laumontite. The lack of luster on the Quartz is most likely due to a micro coating of Chalcedony. The biggest problem that faced most of these specimens is serious damage, and this piece not only has excellent aesthetics, but is in great condition overall compared to most from the find that were in terrible shape and did not display very well. This is one of the best pieces of the material that I’ve offered for sale, and is more than just a Quartz specimen. This is a unique discovery, and would make any Quartz or “cast” collector very happy. This piece was collected in 2010 by Quinton Cross and Ralph Buck. See http://www.mindat.org/photo-241718.html for a similar Quartz replacement specimen from Cripple Creek.

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