|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | bixbyite | 6.00 | poor | Uneven | opaque | none | 4.90 | metallic | black | black | faceted | oxides | Crystals are cubic, sometimes with penetrating twins. |
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