Helvite, Quartz

Unknown Owner

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This specimen features a very large (for the locality) 8 mm, sharp helvite crystal included near the termination of a glassy, transparent to translucent cabinet quartz crystal. It is from the now-defunct Kara-Oba tungsten mine of Kazakhstan (mined for military supply once). The large quartz crystal is complete all-around, has contacting on only one side and has trivial edge wear for such a large crystal. This came from the Fersman Museum of Moscow back stock in the early 1990s, Dmitriy Belakovskiy, then a curator there on travel to the Houston Museum to support the Faberge exhibit.