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SV252 - Franckeite, Zinkenite $ 125 (=~ ¥ 18547) Itos Mine, Oruro, Bolivia miniature - 3.5 x 3 x 2 cm Intergrown spherical clusters of metallic Franckeite with silvery needles of Zinkenite. Franckeite is a rare lead, tin, antimony sulfosalt that is closely related to cylindrite. It was first described in 1893 and named after mining engineers and brothers Carl and Ernest Francke. ©2010-2018 Marin Mineral |