USD 58.00BUY*
Tridymite and Cristobalite Obsidian
Coso Hot Springs, Kern Co., California, United States
98 x 54 x 66mm

A pair of cavities in a chunk of obsidian, lined with tridymite and cristobalite, both of which are polymorphs of quartz. In other words, you have silica in three forms here: a glass (the obsidian) and then the two quartz polymorphs.
Reference:CCX51
minID: C8N-YD7
Verified:22nd Jul 2018

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