Cristobalite and Fayalite Obsidian
Cougar Butte occurrence , Cougar Butte, Cascade Range, Siskiyou Co., California, USA
59 x 37 x 38mm
Inside the Obsidian (a not crystallized volcanic glass) some cavities the (biggest is 17x17 mm), occupied for the most part by Cristobalite in crystals, have formed. One Fayalite's crystal lays on the Cristobalite. Uncommon sample, wit (Silvia Gallery)
From:Minservice.com
Reference:BALD0502
minID: 648-EWY
Verified:23rd Sep 2017
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