Obsidian (Christobalite)
SiO2
wdx 
edx
thin film 
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Millard County, Utah, USA
Dana Class
Strunz Class
| Element | WT% |
| Si | 46.74% |
| O | 53.26% |
| Compound | WT% |
| SiO2 | 100% |
