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Maucherite: Ni11As8
Comments: Reddish, semi-metallic aggregate of feathery maucherite crystals on matrix. Location: Cobalt, Ontario, Canada. Scale: Picture size 2 mm. © Reiner Mielke
Pararammelsbergite: NiAs2
Comments: Columnar crystals of metallic gray pararammelsbergite on massive arsenide ore. Location: Lawson Mine, Cobalt, Ontario, Canada. Scale: Crystal size 1 mm. © Reiner Mielke