Zinnwaldite, Quartz (Var: Smoky Quartz)

Locality: Upper Cramer Lake, Sawtooth Batholith/Sawtooth Mts, Custer Co., Idaho, USA

A fairly large crystal of zinnwaldite mica, with accompanying smoky quartz crystal; collected from above Upper Cramer Lake. The zinnwaldite crystal measures 8.7 cm. across; overall the entire specimen is 10.1 x 8.7 x 4.0 cm.; self-collected.

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Photo added: 1st Dec 2008

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