Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Eagle mine, Gilman, Eagle Co., Colorado, United States
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 6x5x3cm
- Tagged
- carbonate
Sharp creamy rhombic Dolomite crystals from 6 to 11mm on edge. One the crystals, as seen in the last photo, has a small black Sphalerite crystal at the center of a seemingly incomplete crystal of Dolomite. The rest of the Sphalerite comprises the matrix and is also sharp with a deep black color.
- Availability
- Sold
- Locality
- Eagle mine, Gilman, Eagle Co., Colorado, United States
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 8x7x3.5cm
- Tagged
- carbonate
Excellent, sharp, creamy tan Dolomite (or Ankerite) crystals to 8mm. The Dolomite completely covers one side while on the other it is more grey and much of the black Sphalerite is seen. Very nice specimen from the well-known Colorado locality.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 6x4x3.5cm
- Tagged
- carbonate
The old label on this specimen claimed this to be Otavite. It's was a possibility since the Otavite does occur on Cerussite and the crystals are similar not to mention that both are carbonates. Well, not so. This is a specimen of Cerussite with crystals 1.5cm across. The entire specimen is coated with white, rhombic micro crystals of Dolomite. It was tested. Nonetheless, still a good specimen.
- Availability
- Sold
- Locality
- Pamplona, Navarra Mts., Spain
- Formula
- CaMg(CO3)2
- Size
- Miniature 5x3x2.5cm
- Tagged
- carbonate
Pure, colorless, and gemmy crystals of rhombic Dolomite. Old time specimen never seen on the market these days. The largest crystal is to 3.5cm. No damage.
- Availability
- Sold
- Locality
- Homestake mine, Lawrence Co., South Dakota, United States
- Formula
- CaMg(CO3)2
- Size
- Cabinet 12.5x10x3cm
- Tagged
- carbonate
White rhombic, saddle-shaped habit Dolomite crystals to 7mm with needle Quartz. This is from an old collection. The Homestake mine, one of the greatest and largest in the world, is no longer in operation. Specimens such as this one are from "water course" Teritary mineralization.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- CaMg(CO3)2
- Size
- SmCabinet 6x4x4cm
- Tagged
- carbonate
Pink tiny rhombic crystals lining a large vug with tiny acicular and larger prismatic green and yellow Mimetite.
