Interesting textures. Specimen is 34mm wide. Ex Bart Cannon. Click on the image below for a higher resolution version.
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.
A single blue octahedral spinel with minor matrix attached. Width 11mm. Stack of 140 images. Ex Ted Johnson. Collected in July 1987.
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.
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...
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.