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Sphalerite: (Zn,Fe)S Baumhauerite-2a: Pb3As4S9
Comments: Dark crystal of baumhauerite-2a (same shape as baumhauerite) with olive-green transparent sphalerite crystal on white dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture 2 cm tall. © Walter Gabriel
Sphalerite: (Zn,Fe)S
Comments: Highly lustrous, black, complex sphalerite crystals to 15 mm in size completely covering the top of a sulfide matrix. Location: Nanisivik mine, Baffin Island, Northwest Territories, Canada. Scale: 6.5 x 7.5 x 1.8 cm. © Dan Weinrich
Sphalerite: (Zn,Fe)S Ankerite: Ca(Fe++,Mg,Mn)(CO3)2 Dickite: Al2Si2O5(OH)4
Comments: White, rhombohedral crystals of ankerite and dark gray, metallic sphalerite on beige dickite. Location: Prego mine, Kladno, Czech Rebublic. Scale: Picture size 2 cm. © Dave Barthelmy