SecretCup

Saturday, January 01, 2005

Erythrite

Also called  Cobalt Bloom,   arsenate mineral in the vivianite group, hydrated cobalt arsenate [Co3(AsO4)2×8H2O]. Erythrite, which is used as a guide to the presence of cobalt-nickel-silver ores because of its crimson or peach-red colour, occurs as radiating crystals, concretions, or earthy masses in the oxidized zone of cobalt and nickel deposits. It forms a complete solid-solution series with annabergite,

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