Fayalite on Cristobalite in Obsidian
at-auction$ 20
- Locality
- Cougar Butte, Siskiyou Co., California, USA
- Minerals
- Fayalite, Cristobalite
- Dimensions
- 6.8 x 3.5 x 3 cm
- Size class
- Small Cabinet
- SID
- H934
Small Fayalite crystal inside a spherical 'geode' of Cristobalite (a polymorph of Quartz) in Obsidian (non-crystallized
volcanic glass).