Pyrolusite
MnO2
wdx 
edx 
thin film
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Merehead quarry, Cranmore, Somerset
Dana Class
04.04.01.04
Strunz Class
04.DB.05
| Element | WT% |
| Mn | 76.59% |
| O | 23.41% |
| Compound | WT% |
| MnO2 | 100% |
