*** Welcome to Mineral Classics! Monday, July 24, 2017... Our database contains 2562 specimens, encompassing 178 species... Please be sure to check out our new fully searchable database feature (click on the Search Site button on the left side of the screen)

US$    € EURO    ¥ YEN    £ POUND    CAN$    AUS$    Note
(click on a page number to go to that page:)

1

2

3

4

5

6

7

 page 2 / 7  -  prev  -  203 specimens selected  -  next  -  bottom  -  Home 

(click on the pictures to enlarge)


No. CO712B31 - SOLD

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 3.1 x 2.2 x 1.4 cm (thumbnail)
Largest Crystal: 6 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features a beautiful sharp, lustrous, gemmy, bicolor (green and colorless), Apatite crystal measuring 6 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B32 - $ 150.00

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 2.5 x 2.2 x 1.9 cm (thumbnail)
Largest Crystal: 8 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features few beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals measuring up to 8 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B33 - $ 150.00

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 9.3 x 5.5 x 3.2 cm (small cabinet)
Largest Crystal: 6 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features several beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals (some are doubly-terminated) measuring up to 6 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B34 - SOLD

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 5.0 x 4.8 x 2.3 cm (miniature)
Largest Crystal: 6 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features several beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals measuring up to 6 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B35 - $ 95.00

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 3.2 x 1.9 x 1.3 cm (thumbnail)
Largest Crystal: 6 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features several beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals measuring up to 6 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B36 - SOLD

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 4.6 x 2.2 x 1.2 cm (miniature)
Largest Crystal: 5 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features several beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals (some are doubly-terminated) measuring up to 6 mm sitting on Quartz matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B37 - SOLD

Fluorapatite with Fluorite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 2.6 x 2.1 x 1.1 cm (thumbnail)
Largest Crystal: 3 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features a beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystal measuring 3 mm with rarely associated purple Fluorite cubes on matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B38 - SOLD

Fluorapatite with Fluorite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 3.7 x 2.5 x 1.2 cm (miniature)
Largest Crystal: 4 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features a beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystal measuring 3 mm with rarely associated purple Fluorite cubes up to 4 mm on matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B39 - $ 80.00

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 4.6 x 2.3 x 0.9 cm (miniature)
Largest Crystal: 4 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features several beautiful sharp, lustrous, gemmy, bicolor (green and colorless) Apatite crystals (some are doubly-terminated) measuring up to 4 mm sitting on Quartz matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B40 - SOLD

Sphalerite with Galena and Pyrite

Locality: Gilpin Mine, Kokomo (now flooded by the Amax tailings pond), Summit County, Colorado

Specimen Size: 4.8 x 4.6 x 2.6 cm (miniature)


ex.  Brian Kosnar

How often does one find an old specimen of Sphalerite from the Kokomo area!? This particular piece is from my own personal collection, and is the best Sphalerite that I’ve seen from this area, although I have to believe there must be better ones out there. The specimen actually once belonged to Warren Prosser the noted author and geologist who worked in the San Juan Mountains of Colorado. The piece plays host to dozens of sharp, fairly lustrous, attractive, black Sphalerite crystals with a notable matte-grey Galena cube with minor Pyrite matrix. If you’re a Colorado sulfide collector, don’t let this one pass by, as it’s a wonderful representation for the area.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B41 - $ 225.00

Pyrite on Sphalerite

Locality: #3 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 4.6 x 3.4 x 2.8 cm (miniature)
Largest Crystal: 6 mm


ex.  Richard A. Kosnar

A striking sulfide association specimen featuring incredibly sharp, bright, highly lustrous, beautiful, well-formed modified pyritohedral crystals of rich golden Pyrite on contrasting black crystallized Sphalerite matrix. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B42 - $ 165.00

Pyrite (Cathedral Gothic faces)

Locality: #3 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 3.3 x 2.7 x 2.3 cm (miniature)
Largest Crystal: 6 mm


A classic Pyrite specimen from the Black Cloud showing the well-known and distinctive "Cathedral Gothic" faces on nearly every side of the sharp, lustrous, metallic, golden pyritohedral crystals. The luster is so bright on the piece that it was rather difficult to photograph, but we did our best to show off these beautiful arch patterns. The specimen is not perfect, as it does have some contacts, but is still a great example of this hard to find material from a classic Colorado locality. One of the very few pieces of this sought after material that I have offered. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B43 - $ 100.00

Barite on Dolomite

Locality: Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 4.7 x 3.7 x 1.7 cm (miniature)
Largest Crystal: 7 mm


ex.  Brian Kosnar

A wonderful Barite specimen from the Black Cloud featuring very sharp, well-formed, lustrous crystals of pale golden color Barite “blades” associated with small white Dolomite rhombs on blue-grey Chalcedony matrix. Great quality for Barite, and a nice change of pace from the other Leadville pieces that have the rich golden hue that we’re used to seeing. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B44 - $ 250.00

Dolomite with Quartz on Sphalerite

Locality: #6 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 4.3 x 3.2 x 2.8 cm (miniature)
Largest Dolomite Group: 1.1 cm across


A wonderful display specimen from the famous Black Cloud mine featuring highly vitreous rhombohedra of cream colored Dolomite – some of which are oriented into a spherical aggregate at the top of the specimen – which are sitting atop beautifully contrasting silvery-blue Quartz on black Sphalerite matrix. Some minor associated Galena can be seen on the side of the piece as well. It’s such a unique color combination and displays beautifully as you can see from the photos. One of the most interesting and attractive pieces of this material that I have offered. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B45 - $ 170.00

Dolomite on sulfides

Locality: #6 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 6.7 x 4.6 x 2.2 cm (small cabinet)
Largest Dolomite Group: 0.7 cm across


A wonderful display specimen from the famous Black Cloud mine featuring razor-sharp, vitreous rhombohedra of cream colored Dolomite – some of which are oriented into a spherical aggregates – which are sitting atop black Sphalerite, silvery Galena and golden Pyrite matrix. Excellent quality and wonderful aesthetics. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B46 - $ 300.00

Galena with Dolomite

Locality: Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 6.8 x 6.3 x 3.7 cm (small cabinet)
Largest Galena Crystal: 1.5 cm

What an eye-catching sulfide association specimen from the Black Cloud mine. The Galena crystals are essentially cubic in habit, but show a slight amount of what I would describe as being slightly “built-up” with minor stepped faces almost resembling "Cathedral Gothic" Pyrite. Associated with the Galena one can see beautiful “snowball”-esque groups of intergrown vitreous, cream colored Dolomite rhombs. The matrix is a mix of Sphalerite, Pyrite and Galena. For a specimen with very little color, it’s a beautiful piece, and the crystallization catches one’s attention. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B47 - SOLD

Dolomite on Galena

Locality: #6 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 11.7 x 7.0 x 3.7 cm (cabinet)

A wonderful display specimen from the famous Black Cloud mine featuring razor-sharp, vitreous rhombohedra of cream colored Dolomite – some of which are oriented into a spherical aggregates measuring up to 1.1 cm across – which are sitting atop slightly modified matte-grey Galena cubes measuring up to 1.3 cm on edge with underlying Sphalerite matrix. Excellent quality and wonderful aesthetics. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B48 - $ 225.00

Galena

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

Specimen Size: 10.0 x 8.8 x 4.7 cm (cabinet)
Largest Crystal: 6 mm

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. This specimen hosts dozens of sharp, cuboctahedra of silvery Galena associated with small striated pyritohedra of golden Pyrite, plus some small black groups of highly modified Sphalerite crystals on tan “discs” of Siderite matrix. Perhaps the two most interesting aspects of the piece are the smaller crystals i.e., dozens of the most unusual scepter habit Quartz crystals resembling “nail heads” on the terminations, or perhaps more appropriately, melted candles in appearance. I have photographed these strange Quartz crystals under the microscope to better illustrate their quality. Lastly, and as mentioned above, small compressed rhombohedra of pale pink Rhodochrosite can be seen on the reverse side of the specimen, making this a wonderful association specimen with a minimum of seven species present. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B49 - $ 225.00

Sphalerite with Quartz

Locality: #3 Ore Body, 1250’ Level, Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 5.7 x 5.3 x 4.4 cm (small cabinet)
Largest Crystal: 1.1 cm


ex.  Richard A. Kosnar

Hard to photograph, and better in person, this attractive three-dimensional “mound” of black “Marmatite” Sphalerite is comprised of sharp, semi-lustrous, well-formed dodecahedral crystals which are associated with a few gemmy prismatic Quartz crystals. Excellent for the locality, and better than most I have seen from the mine. The Black Cloud was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B50 - SOLD

Siderite on Galena

Locality: 1231 Stope, #1 Ore Body, Black Cloud Mine (Irene Shaft), Leadville, Lake County, Colorado

Specimen Size: 10.7 x 7.7 x 3.6 cm (cabinet)
Largest Crystal: 1.1 cm


ex.  Richard A. Kosnar

Mined in 1977, this striking Siderite specimen features dozens of beautiful greenish-gold colored “discs” intergrown and sitting atop a crystallized plate of HIGHLY lustrous, bright silvery colored modified cubes of Galena with associated metallic bronze Wurtzite on the reverse side of the specimen. Good cabinet sized display specimens like this are not common on the market, and are seldom in such excellent condition. A more than worthwhile specimen from this celebrated Leadville mine. The Black Cloud was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B51 - $ 250.00

Barite

Locality: #1 Stope, 1200 Level, #3 Ore Body, Black Cloud Mine (Irene Shaft), Leadville, Lake County, Colorado

Specimen Size: 2.7 x 1.7 x 0.9 cm (thumbnail)


ex.  Marilyn Dodge

From the famous Marilyn Dodge thumbnail collection, this piece was mined in 1976. A superb, sharp, highly lustrous, fairly thick, gemmy/translucent, beautiful golden color “phantom” crystal group make this full sized thumbnail specimen an important and hard to find piece in this size range. You can see from the shape of the internal phantom, that the habit of the Barite actually changed slightly while the crystals were growing. If you’re a thumbnail collector, or if you appreciate good quality Leadville Barites, even in smaller sizes, don’t miss out on this one. A more than worthwhile specimen from this celebrated Leadville mine. The Black Cloud was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B52 - SOLD

Pyrite

Locality: Irene Mine (ostensibly Black Cloud Mine, “Irene Shaft”), Leadville, Lake County, Colorado

Specimen Size: 4.2 x 3.8 x 3.1 cm (miniature)

A classic Pyrite specimen from the Black Cloud showing the well-known and distinctive striated cubic faces forming the beginnings of "Cathedral Gothic" faces on nearly every side of the sharp, lustrous, metallic, golden crystals. The luster is so bright on the piece that it was rather difficult to photograph, but we did our best to show off these beautiful growth patterns. The specimen is not perfect, as it is slightly roughed up around the edge, but it still a great example of this hard to find material from a classic Colorado locality. One of the very few pieces of this sought after material that I have offered. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B53 - SOLD

Barite

Locality: 1231 Stope, #1 Ore Body, Black Cloud Mine (Irene Shaft), Leadville, Lake County, Colorado

Specimen Size: 8.3 x 5.2 x 4.3 cm (small cabinet)
Largest Crystal: 7 mm

Mined in 1973, this striking specimen features dozens of beautiful greenish-gold colored, rather sharp, lustrous, gemmy “blades” of Barite sitting atop a crystallized plate lustrous, silvery colored modified cubes of Galena. Good cabinet sized display specimens like this are not common on the market, and are seldom in such excellent condition. A more than worthwhile specimen from this celebrated Leadville mine. The Black Cloud was one of the most famous specimen producing locales in Leadville, and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B54 - $ 125.00

Calcite

Locality: N-24 Area, Sherman Mine, Below Mt. Sherman, Upper Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 6.7 x 3.9 x 3.3 cm (small cabinet)


ex.  Richard A. Kosnar

A beautiful crystallized “mound” of off-white color, translucent, modified rhombohedra of Calcite from the world famous Sherman Mine in Leadville. This locality is arguably the most productive specimen producer in Leadville, despite the fact that over 10 million ounces of Silver came out in a period lasting around 11 years (started 1968-1970 and reopened 1975-1982). The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B55 - $ 100.00

Calcite

Locality: N-24 Area, Sherman Mine, Below Mt. Sherman, Upper Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 4.1 x 3.2 x 2.7 cm (miniature)


ex.  Richard A. Kosnar

A beautiful crystallized “mound” of nearly colorless, gemmy, modified rhombohedra of Calcite from the world famous Sherman Mine in Leadville. This locality is arguably the most productive specimen producer in Leadville, despite the fact that over 10 million ounces of Silver came out in a period lasting around 11 years (started 1968-1970 and reopened 1975-1982). The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B56 - $ 45.00

Calcite

Locality: N-24 Area, Sherman Mine, Below Mt. Sherman, Upper Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 4.5 x 2.7 x 1.3 cm (miniature)


ex.  Richard A. Kosnar

A beautiful crystallized “plate” of nearly colorless, gemmy, modified rhombohedra of Calcite from the world famous Sherman Mine in Leadville. This locality is arguably the most productive specimen producer in Leadville, despite the fact that over 10 million ounces of Silver came out in a period lasting around 11 years (started 1968-1970 and reopened 1975-1982). The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B57 - $ 800.00

Hemimorphite with Hydrozincite

Locality: O-22 Area, Sherman Mine, Below Mt. Sherman, Upper Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 12.2 x 9.8 x 5.8 cm (cabinet)


ex.  Richard A. Kosnar

Mined in May of 1980, this hard to find specimen features excellent, gemmy/translucent, silvery colored Hemimorphite crystal groups associated with very rare powder-white Hydrozincite from the world famous Sherman Mine in Leadville. One of the better association specimens of Hemimorphite from the Sherman Mine that we’ve ever seen. This locality is arguably the most productive specimen producer in Leadville, despite the fact that over 10 million ounces of Silver came out in a period lasting around 11 years (started 1968-1970 and reopened 1975-1982). The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B58 - SOLD

Chalcopyrite

Locality: N-19 Area, Sherman Mine, Below Mt. Sherman, Upper Iowa Gulch, Leadville, Lake County, Colorado

Specimen Size: 6.0 x 4.3 x 2.1 cm (small cabinet)
Largest Crystal: 1.4 cm


ex.  Richard A. Kosnar

From the famous Sherman Mine in Leadville, here we have a beautifully crystallized mound of metallic yellow-gold color intergrown tetragonal scalenohedra of Chalcopyrite associated with small silvery-grey crystals of Tetrahedrite and cream colored rhombohedra of Dolomite which are sitting on a crystallized plate of pale golden Pyrite matrix. One of the best Chalcopyrites from the Sherman Mine that I’ve offered for sale. This locality is arguably the most productive specimen producer in Leadville, despite the fact that over 10 million ounces of Silver came out in a period lasting around 11 years (started 1968-1970 and reopened 1975-1982). The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B59 - SOLD

Pyrite

Locality: Moyer Mine, Iron Hill, Leadville, Lake County, Colorado

Specimen Size: 7.1 x 4.6 x 2.6 cm (small cabinet)
Largest Crystal: 2.3 cm


ex.  Bert Sylvenus Butler – circa 1930

One of the best Pyrite specimens that I’ve handled from the Moyer Mine. Such great crystallization with large, well-defined, sharp, lustrous, bright, metallic striated pyritohedra with only very minimal edge-wear. The crystals are nearly an inch across, which is impressive for the locality. Very few of these pieces exist today, and are virtually impossible to find on the market. The piece comes from the collection of  B. S. Butler, who wrote the prolific USGS Professional Paper 144 on Michigan Copper, and whose mineral collection later came to Waldo Butler, who in turn willed it to my uncle nearly 30 years ago, at which point it came to my parents. 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 in other dealers’ inventories.

To order this specimen click here

(click on the pictures to enlarge)


No. CO712B60 - SOLD

Pyrite

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: 7.3 x 4.4 x 3.5 cm (small cabinet)
Largest Crystal: 3.8 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 few, razor sharp, highly lustrous, slightly elongated, golden metallic cubes of Pyrite measuring up to 3.8 cm on edge and are associated with a few smaller Pyrite cubes and very minor "sericite". Despite the damage, this is still an aesthetic 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.

To order this specimen click here

---

(click on a page number to go to that page:)

1

2

3

4

5

6

7

 page 2 / 7  -  prev  -  203 specimens selected  -  next  -  top  -  Home