Pyrite and Sphalerite with Calcite from Deveti Septemvri Mine, Madan District

From Deveti Septemvri Mine, Madan District, Rhodope Mountains, Bulgaria Sparkling cluster of lustrous translucent gray quartz crystals overgrown on dark...

From Madan District, Rhodope Mountains, Bulgaria Sculptural formation of lustrous yellow-metallic pyrite crystals with Sphalerite. The pyrite crystals are cubic form with pyritohedra...

From Deveti Septemvri Mine, Madan District, Rhodope Mountains, Bulgariaina Rare large specimen of crystals of arsenopyrite with quartz. The arsenopyrite crystals are in complex aggr...

From Alimon Mine, Huaron, Cerro de Pasco, Peru Large formation of metallic chalcopyrite crystals overgrown on lustrous jet black sphalerite accented by small flat rhombic calcite ...

From Casapalca District, Huarochiri Province, Peru. Large lustrous striated cubic yellow-metallic pyrite crystals with black-metallic sphalerite crystals. Weight: 15 lbs, Dimension...

From Elmwood Mine, Tennessee, United States. Large, museum-quality, lustrous transparent deep golden calcite with large cubic purple fluorite crystals...

This formation of massive, beautifully formed, incredibly gemmy calcite crystals characteristic of the Chengzhou location came out of the ground over a decade ago and will make a cla...

Stunning Pyrite piece from the mineral-rich soils of Peru, this piece is a symphony of metallic luster and geometric precision. Its perfect cubic crystals are interlocked in a captiv...

This true museum quality 1.74 lb. combination specimen from the Muzo emerald mines in Colombia features two large beautifully formed emerald crystals – each measuring approximately 1...

These large, sharply defined, beautifully formed golden calcite crystals out of the famed calcite mine in Elmwood, Tennessee heave beautiful golden pigmentation especially toward the...

17th century Italian vase with a calcite crystal cluster in matrix with sphalerite. This fragment is from a church in Florence. It was found and saved from the historic flooding of the Arno River in 1966. The calcite crystal cluster with sphalerite is from Elmwood Mine in Tennessee. It is an example of the world’s finest crystallized calcite. With the unusual formation of sphalerite, it is unequaled by those from any other part of the world (featured in American Mineral Treasures, pg. 337). These minerals are formed from the chemical precipitation of calcium carbonate and zinc. The minerals are essentially deposited on the walls, floors, and ceiling of the geological caverns of the zinc mine. It is known for producing some of the most superb various examples of calcite, fluorite, and sphalerite with exceptionally large and sharp calcite clusters. The piece has been naturally distressed from the flood. It has been preserved and transformed by Jean O'Reilly Barlow, the creative director of Interi. The date of manufacture reflects when she created the piece and the period shows that the Italian fragment is originally 17th century. The story and history of this piece and Interi's collection of Florence fragments...

Sculptural 18th century Italian wood chalice decorated with calcite crystals in sphalerite on a Lucite base. The hand carved and painted chalice is from a...