"Mineral Classics" - Dealing in fine minerals and gems for over 35 years! Online for nearly 10 years!

 











*** Welcome to Mineral Classics! Monday, July 28, 2014... Our database contains 2450 specimens, encompassing 176 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)




Gemstones Cut By Us

We are very excited to present this beautiful update of our custom cut and hand carved gemstones.  This update contains some of the finest gems to have come out of our shop.  Faceting large gemstones requires much hard work and patience, and even more so with hand carved gems because they first must be faceted, then carved and finally hand polished to give them their unique appearance.  All of these gemstones were cut from hand selected, high quality gem rough.  We strive to create fine quality, amazing and unique custom gemstones that are seldom seen on today's market.   All of the stones on this page were faceted by Allyce and Brett Kosnar.  All of these gems can be made into a custom pieces of jewelry by Brett Kosnar, upon request!


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Ametrine from Bolivia [./newmixgem1211/ametrbol1648a.JPG] Ametrine from Bolivia [./newmixgem1211/ametrbol1648b.JPG] Ametrine from Bolivia [./newmixgem1211/ametrbol1648c.JPG] Ametrine from Bolivia [./newmixgem1211/ametrbol1648d.JPG] Ametrine from Bolivia [./newmixgem1211/ametrbol1648e.JPG]

Gemstone # AMETRBOL1648
Name: Ametrine
Locality: Bolivia
Weight: 16.48 carats
Size: 20.72 x 14.52 mm
Price per Carat: $ 75.00
Price For Stone: $ 1236.00
      Cut: Bubble Slant Bar
Color: Purple and Yellow
Clarity: Eye Clean
Cut by Us: yes
Availability: Available

Comments:

This is a unique variety of Quartz from the finest occurrence in the world. Ametrine is a naturally occurring purple and yellow bi-color variety that is formed by a unique twin law ("Brazil Law Twinning") where two separate individually colored crystals are intergrown to form an alternating "radiation" pattern of purple and yellow triangles when viewed down the c axis. The two colors are oriented based upon their position inside the crystal to create the famous bicolor gemstones. This stone has half sphere-shaped "bubbles" that were hand carved into the pavilion. The gem has amazing clarity, and the carving on the bottom makes it really "stand out" from other Ametrine gemstones. Hand carving a stone can be very time consuming, requiring much control and patience, but as you can see it is well worth it for the end result. A truly superb gemstone for its fantastic quality, great saturation and truly ONE-OF-A-KIND design! This stone was hand carved and faceted by Allyce Kosnar. Quartz is a 7.00 on the Mohs hardness scale.

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Topaz from Brazil [./newmixgem1211/topbraz1148a.jpg] Topaz from Brazil [./newmixgem1211/topbraz1148b.jpg] Topaz from Brazil [./newmixgem1211/topbraz1148c.jpg] Topaz from Brazil [./newmixgem1211/topbraz1148d.jpg]

Gemstone # TOPBRAZ1148
Name: Topaz
Locality: Brazil
Weight: 11.48 carats
Size: 15.21 x 10.80 mm
Price per Carat: $ 40.00
Price For Stone: $ 459.20
      Cut: Barrion Modified Cushion
Color: Blue
Clarity: Eye Clean
Cut by Us: Yes
Availability: Available

Comments: I can honestly say this gem is exceptional, as the pictures speak for themselves. This stunning Topaz reigns from Brazil and has excellent faceting workmanship, clarity and saturation. Now please note we do believe this stone has INDEED been heated to achieve beautiful "ocean" blue color which is very common among Topaz and completely accepted in the gem world. This gem has a flashy, custom, modified, elongated cushion cut. This stone was faceted by Allyce Kosnar. Mohs hardness of 8

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Topaz from Brazil [./newmixgem1211/topbraz1842a.jpg] Topaz from Brazil [./newmixgem1211/topbraz1842b.jpg] Topaz from Brazil [./newmixgem1211/topbraz1842c.jpg] Topaz from Brazil [./newmixgem1211/topbraz1842d.jpg] Topaz from Brazil [./newmixgem1211/topbraz1842e.jpg]

Gemstone # TOPBRAZ1842
Name: Topaz
Locality: Brazil
Weight: 18.42 carats
Size: 17.06 mm
Price per Carat: $ 40.00
Price For Stone: $ 736.80
      Cut: Modified Trillion
Color: Blue
Clarity: Eye Clean
Cut by Us: yes
Availability: Available

Comments:

This Topaz is from Brazil and has a dazzling modified "kaleidoscope" trillion cut. It really plays with your mind as you look at it, truly having a "kaleidoscope" effect. This gem is superb in all aspects including clarity, saturation, "flash", and workmanship. Now please note we do believe this stone has INDEED been heated to achieve the beautiful "ocean" blue color which is very common among Topaz and completely accepted in the gem world. This stone was faceted by Allyce Kosnar. Mohs hardness of 8

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Spinel from Tanzania [./newmixgem1211/spintanz460a.jpg] Spinel from Tanzania [./newmixgem1211/spintanz460b.jpg] Spinel from Tanzania [./newmixgem1211/spintanz460c.jpg] Spinel from Tanzania [./newmixgem1211/spintanz460d.jpg]

Gemstone # SPINTANZ460
Name: Spinel
Locality: Tanzania
Weight: 4.60 carats
Size: 10.26 mm
Price per Carat: SOLD
Price For Stone: SOLD
      Cut: Modified Square Cushion
Color: Hot Pink
Clarity: VS
Cut by Us: yes
Availability: sold

Comments:

This is by far one of the largest Spinels to come out of our shop, weighing in at a shocking 4.60 cts. This being said, large stones are very rare. In fact, any Spinel over two carats is rare. Natural Spinel is a gemstone that is not well known in the commercial jewelry world, but  has become a great favorite with gem dealers and gem collectors. The most sought after colors by collectors are red, hot pink, and flame orange. Spinel is a magnesium aluminate colored by chromium and iron. It is quite hard (8 on the Mohs scale), and it forms as a cubic crystal like a diamond. Spinel occurs in octahedral crystals, and has a complete absence of cleavage (unlike diamond). Due to Spinel's excellent dispersion, gem spinels can possess vivid fire.  The intensity of Spinel color is partially due to the fact that Spinel is singly refractive. Most gemstones are doubly refractive; in fact only diamond, spinel and garnet are singly refractive. This gem is truly better in person as the pictures can not capture its fire and color. It does have a slight "veil" inclusion which is common to Spinel, but nothing that detracts from the visual beauty of the stone. This is a beautiful, stunning gem, folks, plain and simple. Its one of those rare gems that will stop people in their tracks at first glance and you'll see people constantly trying to catch a better look at it. Please note this gem is copletely natural, NOT heated or treated in anyway! This stone was faceted by Allyce Kosnar.

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Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig300a.jpg] Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig300b.jpg] Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig300c.jpg]

Gemstone # TOURMNIG300
Name: Elbaite Tourmaline
Locality: Nigeria
Weight: 3.00 carats
Size: 10.39 mm
Price per Carat: $ 200.00
Price For Stone: $ 600.00
      Cut: Cut Corner Triangle
Color: Orange
Clarity: Eye Clean
Cut by Us: yes
Availability: Available

Comments:

Nigerian Tourmaline can come in a large range of colors from orange, orange pink, cranberry pink, purple, purplish pink, light pink, and many different greens and even some blues. This stone has a lovely "peachy" orange color which is becoming more sought after by gem collectors and dealers. It has a sparkling, "cut corner" trillion cut and the larger table is something not commonly seen on many gems today, but it really lets in a lot of light, allowing the stone to "come to life". The pictures do not do this gem justice, it must be seen in person to apprciate its true beauty. This stone was faceted by Allyce Kosnar. Mohs hardness of 7 - 7.5

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Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig550a.jpg] Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig550b.jpg] Elbaite Tourmaline from Nigeria [./newmixgem1211/tourmnig550c.jpg]

Gemstone # TOURMNIG550
Name: Elbaite Tourmaline
Locality: Nigeria
Weight: 5.50 carats
Size: 14.64 x 10.34 mm
Price per Carat: $ 175.00
Price For Stone: $ 962.50
      Cut: Antique Oval
Color: Olive Green
Clarity: Eye Clean
Cut by Us: yes
Availability: Available

Comments:

Nigerian green Tourmalines can range from pastel green, yellowish green, olive green, turquoise green, rich green to dark green. I would have to say this gem is a lovely "olive" yellowish green color. What really makes this gem special is the unique "antique oval" cut. I simply came up with this cut because I wanted to conserve as much of the gem material as possible, and to create a unique oval cut. I was very happy with the results as I hope you will be as well. This stone has vintage, Victorian Age fell to it. This gem has excellant clarity and saturation, and I think it would look wonderful and elegant set into a ring. This stone was faceted by Allyce Kosnar. Mohs hardness of 7 - 7.5

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Opal from Ethiopia [./newmixgem1211/opalethi511a.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511b.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511c.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511d.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511e.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511f.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511g.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511h.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511i.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511j.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511k.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511l.JPG] Opal from Ethiopia [./newmixgem1211/opalethi511m.jpg] Opal from Ethiopia [./newmixgem1211/opalethi511n.jpg]

Gemstone # OPALETHI511
Name: Opal
Locality: Ethiopia
Weight: 4.85 carats
Size: 13.27 mm
Price per Carat: $ 350.00 SOLD
Price For Stone: $ 1697.50 SOLD
      Cut: Modified Trillion
Color: Orange and Blue with Color Flash
Clarity: Opalescent
Cut by Us: yes
Availability: sold

Comments:

First off, it must be noted that this gem is BETTER IN PERSON, as the camera simply cannot capture the brilliant three-dimensional array of color that can only be seen in person. Recently there has been some very attractive and impressive Fire Opals coming out of Ethiopia. These gems rival some of the better Mexican stones for color, gemminess and the ever popular "Contra Luz" effect. This "Mumble" cut gem has a beautiful, soft golden color in reflected light, but in transmitted light, it shows the highly desirable and seldom seen COLOR FLASH or "Contra Luz" effect with a beautiful rainbow-like array of color!  This stone shows flashes of blue, yellow, orange, green, red and gold.  It's a very attractive stone, and would make a great piece of jewelry, or would stand on its own as a beautiful collector's gem. This gem was custom-faceted by Brett Kosnar in October of 2011, and is one of the largest and most brilliant Fire Opals that we've seen from Ethiopia. We saw this exact material selling for 250 EUROS (approximately $350) PER CARAT and the Munich Show last month, meaning that this stone would have been valued at $1788.50 retail. Don't miss out on this superb and eye-catching, one-of-a-kind stone with custom cutting by Brett Kosnar.

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Beryl var. Aquamarine from Mozambique [./newmixgem1211/aquamoz213a.JPG] Beryl var. Aquamarine from Mozambique [./newmixgem1211/aquamoz213b.JPG] Beryl var. Aquamarine from Mozambique [./newmixgem1211/aquamoz213c.JPG] Beryl var. Aquamarine from Mozambique [./newmixgem1211/aquamoz213d.JPG] Beryl var. Aquamarine from Mozambique [./newmixgem1211/aquamoz213e.JPG]

Gemstone # AQUAMOZ213
Name: Beryl var. Aquamarine
Locality: Mozambique
Weight: 2.13 carats
Size: 8.22 mm
Price per Carat: $ 175.00
Price For Stone: $ 372.75
      Cut: Cut Corner Triangle
Color: Blue
Clarity: Eye Clean
Cut by Us: yes
Availability: Available

Comments:

Aquamarine is part of the Beryl family. The word Aquamarine is derived from the Latin word for sea-water because the colors can range from shades of green-blue to blue. The presence of iron is what gives Aquamarine its color, a color which ranges from an almost color-less pale blue to a strong sea-blue. Aquamarine comes from many different exotic localities all over the world including Namibia, Nigeria, Madagascar, Zambia, Pakistan, Brazil and Mozambique and even Colorado! African Aquamarines have been know to have some of the best "deep sea" blue that is sought after in Aquamarine. This particular gem has a beautiful, soft yet strong "baby" blue color, great clarity and flash. This stone was faceted by Allyce Kosnar. Mohs hardness 7.5 - 8

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Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303a.JPG] Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303b.JPG] Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303c.JPG] Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303d.JPG] Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303e.JPG] Labradorite Sunstone from Oregon [./newmixgem1211/sunoreg303f.JPG]

Gemstone # SUNOREG303
Name: Labradorite Sunstone
Locality: Oregon
Weight: 3.03 carats
Size: 9.22 mm
Price per Carat: $ 100.00
Price For Stone: $ 303.00
      Cut: Modified Round Brilliant
Color: Red/Orange
Clarity: Copper Shiller Inclusions
Cut by Us: yes
Availability: Available

Comments:

One of the most exceptional things I have seen from the United States is Sunstone from Oregon. The fact that this is transparent, NATURALLY colored Feldspar is remarkable considering that well over 99% of all other Feldspar on the planet (millions of tons) is completely opaque, and not even worth considering for cutting. This material comes in a myriad of colors ranging from yellow, orange, red, green and even blue in rare cases. Aside from the extremely rare blue variety, the most difficult to find color of this material in good sized stones is red. This stone is a gorgeous peachy-red color gem with strong and eye-catching "shiller" which is micro Copper inclusions throughout the stone. This is highly common among Sunstones from Oregon.  This is a fantastic gemstone for the price! This stone was faceted by Allyce Kosnar. Mohs hardness 6 - 6.5

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Madeira Citrine from Brazil [./newmixgem1211/citbraz528a.JPG] Madeira Citrine from Brazil [./newmixgem1211/citbraz528b.JPG] Madeira Citrine from Brazil [./newmixgem1211/citbraz528c.JPG] Madeira Citrine from Brazil [./newmixgem1211/citbraz528d.JPG] Madeira Citrine from Brazil [./newmixgem1211/citbraz528e.JPG] Madeira Citrine from Brazil [./newmixgem1211/citbraz528f.JPG]

Gemstone # CITBRAZ528
Name: Madeira Citrine
Locality: Brazil
Weight: 5.28 carats
Size: 12.53 mm
Price per Carat: $ 50.00 SOLD
Price For Stone: $ 264.00 SOLD
      Cut: Trillion
Color: Orange
Clarity: Eye Clean
Cut by Us: yes
Availability: sold

Comments:

Citrine is a member of the Quartz family and while there is natural golden Citrine most intense color Citrines are heated.  This gem is heated to achieve its lovely golden "autumn" color. This gem is truly like fire in your hands! It has exceptional clarity, saturation, faceting and is sure to be a crowd pleaser! I think it would look dashing in a ring or pendant, especially for someone with a November Birthday as Citrine is the birthstone for that month. Faceted by Brett Kosnar. Mohs hardness of 7

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Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350a.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350b.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350c.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350d.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350e.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350f.JPG] Smoky Quartz from Lake George, Colorado [./newmixgem1211/smokycol1350g.JPG]

Gemstone # SMOKYCOL1350
Name: Smoky Quartz
Locality: Lake George, Colorado
Weight: 13.50 carats
Size: 13.18 mm
Price per Carat: $ 25.00 SOLD
Price For Stone: $ 337.50 SOLD
      Cut: Barrion Square
Color: Brown
Clarity: Eye Clean
Cut by Us: yes
Availability: sold

Comments:

Smoky Quartz comes for many different localities in the world.  Colorado is one of the premiere localities for superb quality Smoky Quartz. It is commonly associated with the blue/green mineral Amazonite in crystalized specimens. This gem features a lovely, warm, golden brown, cognac color and has a deep, modified square cut. This stone has excellent clarity, saturation of color and faceting. This stone was faceted by Allyce Kosnar. Mohs hardness of 7

To order this specimen click here