Obsidian (Lipari)
70-75 SiO2,MgO,Fe3O4
wdx 
edx 
thin film
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Monte Pilato nr. Porticello Lipari
Dana Class
Strunz Class
| Element | WT% |
| K | 2.99% |
| Na | 5.38% |
| Al | 7.56% |
| Si | 34.99% |
| O | 49.08% |
| Compound | WT% |
| K2O | 3.6% |
| Na2O | 7.26% |
| Al2O3 | 14.29% |
| SiO2 | 74.85% |
