Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Eagle mine, Gilman, Eagle Co., Colorado, United States
- Formula
- CaMg(CO3)2
- Size
- Cabinet 8x10x4cm
- Tagged
- carbonate
This is an aesthetic and clean specimen with large opaque cream-colored Dolomite rhombs over 3cm with tiny clusters of tarnished Tetrahedrite crystals to 3mm on sides and edges of the Dolomite crystals.
- Availability
- Sold
- Locality
- Florence mine, Egremont, Cumbria, England
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 6x8x4cm
- Tagged
- carbonate
Light tan-pink curved rhombohedral Dolomite crystals to 6mm covering a 3cm wide section on red-brown botryoidal Hematite matrix.
- Availability
- Sold
- Locality
- Mina Ojuela, Mapimi, Durango, Mexico
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 9x7x3cm
- Tagged
- carbonate
After I got to looking at this specimen, I realized how nice it actually is. The crystals of Dolomite are large and prestine. The largest crystal is 2cm wide. All about matrix matrix are much smaller crystals of either Dolomite and/or Calcite. These are are also perfect rhombs and average 3mm. No damage aside from one little ding, otherwise clean. Nice piece form this famous and classic locality.
- Availability
- Sold
- Locality
- Homestake mine, Lawrence Co., South Dakota, United States
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 8x4x2.5cm
- Tagged
- carbonate
White Dolomite in rhombs and casts with colorless Adularia, Pyrite and Quartz. This is a good typical specimen from Homestake's "water course" mineralization, which occured deep underground as extremely hot water conduits. Often times, these dikes were filled with spectacular crystals of quartz, adularia, pyrite, sphalerite etc. I often thought these deposits were actually alpine type mineralization, just underground however but still in mountainous terrain.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- CaMg(CO3)2
- Size
- Miniature 5x4x2.5cm
- Tagged
- carbonate
Pink rhombic crystals mostly to 3mm but also having larger 7mm crystals perched at the top.
- Availability
- Sold
- Locality
- Homestake mine, Lawrence Co., South Dakota, United States
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 9x7x4.5cm
- Tagged
- carbonate
A "watercourse" specimen from the now closed Homestake gold mine. This specimen has colorless Dolomite rhombs to 8mm and Calcite crystals around 2-3mm with 2-3mm Pyrite crystals. Coverage on backside too.
