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Tazieffite: Pb20Cd2(As,Bi)22S50Cl10
Comments: Tiny acicular, metallic tazieffite crystals free-standing on matrix formed by volcanic sublimation. Location: Mutnovsky Volcano, Kamchatka, Russia. Scale: Specimen size 0.8 x 0.5 x 0.5 cm. © Tom Loomis / Dakota Matrix