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Proustite on acanthite, Imitar, Morocco; 1 1/2" Ac

This piece consist of microcrystals of proustite (silver antimony sulfide) on a matrix of acanthite crystals. Acanthite is the silver sulfide. Proustite is over 1000 times rarer than acanthite. The combination of the two species rare. This piece was bought from Philippe Russo in early 2019.

Matthew Webb Photo

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