Cristobalite in with Fayalite Obsidian
Cristobalite with Fayalite in Obsidian Cristobalite with Fayalite in Obsidian from Siskiyou County, CA. Weighs about 13.5 Oz and measures about 5" x `1.75" x 2" tall Solid with one great examples of the inner and outer Cristobalite specimen