Prosperite

arsenate

Tsumeb

Formula: Ca2Zn4(AsO4)4.H2O
Hydrated normal arsenate
Specific gravity: 4.31
Hardness: 4½
Streak: White
Colour: Colourless, White
Environments

Hydrothermal environments

Prosperite is a rare secondary mineral.

At the type locality, the Tsumeb Mine, Oshikoto Region, Namibia, prosperite has been found in partly altered sulphide ore from a
dolostone - hosted hydrothermal polymetallic ore deposit, associated with tennantite, chalcocite, mercurian silver, cuprite, cuprian adamite, cuprian austinite, conichalcite, stranskiite, lavendulan, köttigite, tsumcorite, koritnigite and o’danielite (HOM, AM 65.208).

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