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Comments: Black dendritic eucairite in white calcite crystal.
Location: Skrikerum Copper Mine, near Tyrsarum, Kalmar, Sweden.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Eucairite: CuAgSe Schlemaite: (Cu,[ ])6(Pb,Bi)Se4 Clausthalite: PbSe
Comments: Reflected-light digital-image of the intermixed schlemaite grain in type sample F2, from which the reflectance, crystallographic and crystal-structure data were obtained. (CanMin, v 41, p 1435).
Location: "Tiber" dike, -855-m level, block 5128, main shaft # 371, Niederschlema-Alberoda vein-type uranium depost at Hartensein, Erzgebirge, Germany.
Scale: See Picture.
© Canadian Mineralogist
Eucairite: CuAgSe Crookesite: Cu7(Tl,Ag)Se4
Comments: Polished section (PPL) showing zoned crystal of cream-colored eucairite and pale lavender crookesite along with steel blue umangite and white clausthalite in dark gray gangue..
Location: Mine dump (tailings) of Shaft 371 near Hartenstein/Saxony, Germany.
Scale: Picture size 5 mm.
© Thomas Schlothauer