Calcite, Wad
Idarado Mine, Telluride, Ouray District (Uncompahgre District), San Miguel Co., Colorado, USA
Small Cabinet, 6.9 x 1.5 x 0.9 cm
This old Colorado specimen came out of the Kaar Collection, and came with a label that identifies the coating on this calcite crystal as manganese dioxide - but with a question mark after it - so without testing it we cannot be sure that is what it is. At any rate, old Idarado specimens are quite rare on the market, and this is one. 6.9 x 1.5 x 0.9cm