Rare Blue Metallic Berthierite with included calcites and quartz on Pyrite Matrix. Larger specimen for the expert collector
Dimensions (millimeters): 70 x 65 x 45
Dimensions (inches): 2.75 x 2.45 x 1.8
Origins: from San Martin Mine, Zacatecas, Mexico
FeSb2S4, lab analyzed for accuracy. The blue is a natural patina. Collected in Mexico in the 1980s
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