|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | sapphire | 9.00 | none | conchoidal | Transparent | none | 3.90 | glassy | blue | white | faceted | oxides | Blue, yellow, green, pink, purple and clear corundum--if it's red, it's ruby. |
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