Bayldonite

Formula: Cu3PbO(AsO3OH)2(OH)2
Specific gravity: 5.5
Hardness: 4½
Streak: Siskin green to apple green
Colour: Green, apple-green, yellow-green
Solubility: Soluble with difficulty in hydrochloric acid

Hydrothermal environments

Occurrence: Bayldonite is a relatively rare secondary mineral occurring in the oxidised zones of polymetallic deposits.

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