|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | betafite | 5.00 | none | conchoidal | Transparent | none | 3.70 | glassy | black | yellow | faceted | hydroxides | Contains Uranium. As radiation destroys crystal structure, mineral becomes opaque with earthy luster |
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