Calcite, Wad

Unknown Owner

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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