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RM3491   Arsenolamprite and arsenic

A very rich specimen in arsenolamprite, a polymorph of arsenic. As a brilliant vein, grey in colour and with a metallic lustre, formed by lamellar crystals. It is surrounded by very dark grey arsenic. A rare species.

Size: 4.2 x 2.8 x 2.5 cm.
Ex. J. Viñals. Col. E. Nicolau (Barcelona).
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