|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | allanite | 5.50 | poor | conchoidal | opaque | none | 4.10 | submetallic | black | black | faceted | silicates | Dark brown to black color. |
|