20076 Amethyst, Pohndorf Mine, Toll Mountain, Boulder Batholith, Jefferson Co., Montana, USA
Interesting textures. Specimen is 34mm wide. Ex Bart Cannon. Click on the image below for a higher resolution version.
Montana
4575 Tyuyamunite, Marie Mine, Carbon Co., Montana, USA
Bright yellow flowers of tyuyamunite. Ex Bob Rothenberg. Width of view 3.5mm. Stack of 30 images. Click on the image below for a higher resolution version.
1005 Spinel, Crazy Sphinx Mine, Helena, Helena Mining District, Lewis and Clark Co., Montana, USA
A single blue octahedral spinel with minor matrix attached. Width 11mm. Stack of 140 images. Ex Ted Johnson. Collected in July 1987.
2831 Mooihoekite, Stillwater Mine, Nye, Stillwater Co., Montana, USA
Pale brass-yellow metallic mooihoekite associated with some dark brass-yellow chalcopyrite.
0537 Veszelyite, Black Pine Mine (Combination Mine; Black Pine Tailings; Black Pine Dump), Flint Creek Valley, John Long Mts, Philipsburg District (Flint Creek District), Granite Co., Montana, USA
Ex Joan Lamond 3195, but number does not match her Micro Collection Catalogue. Probably from her other mineral collection. Typical blue coloured crystals off matrix.
8048 M2750 Veszelyite, Black Pine Mine, Montana, USA
A deep blue veszelyite from the Black Pine Mine (Combination Mine; Black Pine tailings; Black Pine dump), Black Pine Ridge, John Long Mts, Philipsburg District (Flint Creek District), Granite Co., Montana, USA. Ex Bernie Day...
5535 Bornite after Chalcocite, Belmont Mine, Butte, Silver Bow Co., Montana, USA
Bornite pseudomorph after chalcocite, Belmont Mine, Butte, Butte District (Summit Valley District), Silver Bow Co., Montana, USA. Labelled as A Vein, 3000 Level. Ex Hatfield Goudey. Ex John Lewis Collection.