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proustite MIN

proustite

براوستيت كبرتيد الفضة والزرنيخ

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The streak is purplish-red, thus differing markedly from the scarlet streak of proustite and affording a ready means of distinguishing the two minerals. en.wikipedia.org

Proustite occurs in hydrothermal deposits as a phase in the oxidized and supergene zone. en.wikipedia.org

It is closely allied to, and isomorphous with, the corresponding sulfarsenide known as proustite or light red silver ore. en.wikipedia.org

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