Glaucodot (Co,Fe)AsS Orthorhombic

Description: Rare gray metallic copper, iron and arsenic sulfide found in hydrothermal deposits.

RUSK COUNTY: Occurs either as pseudo-isometric crystals or as coatings on or pseudomorphs after pyrite, from the Flambeau Copper Mine, Ladysmith. ( Dan Behnke, pers. com.)

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