Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Emma mine, Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- Miniature 4.5x2.5x2cm
- Tagged
- carbonate
Rhombic crystals to 1.5cm in a good cluster. No real damage, handsome specimen.
- Availability
- Sold
- Locality
- Emma mine, Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- SmCabinet 5.5x3x2cm
- Tagged
- carbonate
Pink rhombic crystals to 1.5cm with tiny Chalcopyrite crystals. Nice piece, in good condition from Chris van Laer's collection.
- Availability
- Sold
- Locality
- Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- SmCabinet 6x5x1cm
- Tagged
- carbonate
In prep for the upcoming Butte Special Edition, I was flipping through the 5 flats of material I have from Butte, all from Chris van Laers collection. I discovered this great petrological specimen which shows vein filling of pink Rhodochrosite in pegmatitic granite. The vein filling shows a little Quartz filling also and the granite is mineralized with sulfide, probably Pyrite. It is slightly polished on one side and unpolished on the other. It is a slab about 1cm thick.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Emma mine, Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- SmCabinet 9x5.5x4cm
- Tagged
- carbonate
Cabinet specimen with individual pink rhombs to 2.5cm with minor Pyrite. Fairly nice specimen for this locality best known for its Rhodochrosite. Mindat # CP9-UDR.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- Cabinet 11x8x4.5cm
- Tagged
- carbonate
A large specimen cut on one side which shows the unique crystallization of the Rhodochrosite as well as the inward growth patterns of the Galena and Sphalerite. Rhodochrosite is an ore of manganese and more can be learned from our Butte mine article.
2lbs 4 oz.
- Availability
- Sold
- Locality
- Emma mine, Butte dist., Silver Bow Co., Montana, United States
- Formula
- MnCO3
- Size
- Cabinet 10x10x10cm
- Tagged
- carbonate
Cabinet specimn with a thick open vein lined with 3-6mm rhombic crystals. Scarse material from a long closed famous mining district.
