Object Record
Images
Metadata
Object Name |
Columbite |
Object Description |
A large, partial crystal of black, prismatic and striated columbite with a dark purple tarnish and minor amounts of colorless quartz present. ** RADIOACTIVE ** |
Rock type |
Mineral |
Chemical Comp |
(Fe, Mn)(Nb)2 O6 |
Crystal System |
Orthorhombic |
Sp Grav. |
5.43 |
Hardness |
6 |
Luster |
Sub-metallic |
Streak |
Black to Dark Brown |
Fracture |
Irregular |
Radioactivity mR/hr |
0.30 |
Search Terms |
NORM Radioactive |
Dimensions |
H-4 W-5 L-11.55 cm |
Catalog Number |
7911 |