Proustite crystals. Proustite (silver arsenic sulphide, or silver sulpharsenide) occurs worldwide in silver mines and is considered a primary ore of silver. It is a rare but spectacular mineral, notable for its intense crimson hue. However, it becomes dull black and opaque on exposure to oxygen, as with the sample shown here.

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Creative#:

TOP06670600

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達志影像

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RM

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須由TPG 完整授權

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