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MINERAL IDENTIFICATION PROJECT |
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Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | columbite-tantalite | 6.00 | poor | conchoidal | opaque | none | 5.30 | submetallic | black | red | tabular | oxides | Color can have red tones in the black. Streak can be dark-red to black. |
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