Hydrated arsenate containing hydroyl
Specific gravity: 3 to 3.25
Hardness: 1½ to 2
Streak: Paler than unpowdered colour
Colour: Turquoise-blue, blue-green; light bluish green in transmitted light.
Solubility: Soluble in acids and ammonia
Tyrolite is an uncommon secondary mineral in the
oxidised zone of copper deposits, typically formed
by alteration of tennantite and associated with
aurichalcite, cuprite and iron oxyhydroxides.
In the Tintic district, Utah, USA, tyrolite is associated with chalcophyllite and conichalcite.
Common impurities: S,O
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