Object Record
Images
Metadata
Object Name |
Psilomelane |
Object Description |
A sample of black, metallic and dull, globular - or spheroidal - aggregates of cryptomelane. One area has slightly elevated radioactivity due probably to trace elements included in the chemical make up. ** WEAKLY RADIOACTIVE ** |
Place of Origin |
North Carolina/McDowell County |
Rock type |
Mineral |
Chemical Comp |
Ba·(H2O)Mn5 O10 |
Crystal System |
Orthorhombic |
Sp Grav. |
4.18 |
Hardness |
5 - 5.5 |
Luster |
Metallic |
Streak |
Yellowish |
Fracture |
Irregular |
Radioactivity mR/hr |
0.10 |
Variety |
Cryptomelane |
Search Terms |
NORM Radioactive |
Dimensions |
H-3.5 W-5.5 L-7 cm |
Catalog Number |
3227 |