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Comments: Massive franckeite with pockets of small .5 mm crystals.
Location: Animas Mine, Atocha-Quechisla district, Sud Chichas Province, Potosí Department, Bolivia.
Scale: 25x20x15 mm.
© John Betts - Fine Minerals
Franckeite: (Pb,Sn)6Fe++Sn2Sb2S14 Potosiite: Pb6Sn2FeSb2S14
Comments: Visually indistinguishable metallic potosiite/franckeite crystals to 6 mm..
Location: San Jose mine, Oruro City, Oruro Department, Bolivia.
Scale: Crystal size 6 mm.
© Rob Lavinsky