Metallic Silver Ore "Ruby Silver" Mineral Specimen
Dimensions (millimeters); 20 x 12 x 6 (small)
Dimensions (inches); .75 x .5 x .24 (small crystal)
Origin: San Juan De Reyas Mine, Guanajuato, Mexico, mined in the 1980s
Chemistry: (Ag, Cu)16Sb2S11, Silver Copper Antimony Sulfide. Polybasite is a somewhat uncommon silver bearing mineral.
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