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Helvite and smoky quartz vug
Helvite and smoky quartz vug
Photo Copyright © William C. van Laer, 2008
  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality:
Benedict Creek area (Devil's Den), Sawtooth Batholith/Sawtooth Mts, Boise Co., Idaho, USA
A typical Sawtooth batholith miarolitic cavity; screwdriver for scale. This vug contained a few specimens of smoky quartz and albite; when I got them home, I found a nice tetrahedron of brown helvite on one matrix. Photo taken July 1994.
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