A large, very interestingly shaped specimen of the manganese oxide hollandite from Morocco. It is very difficult to distinguish manganese oxides from each other visually, this specimen was analyzed in the laboratory .
A large, very interestingly shaped specimen of the manganese oxide hollandite from Morocco. It is very difficult to distinguish manganese oxides from each other visually, this specimen was analyzed in the laboratory .
| Weight | 587 g |
|---|---|
| Dimensions | 45 × 85 × 210 mm |
