|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | onyx (quartz) | 7.00 | none | conchoidal | Translucent | none | 2.65 | glassy | white | white | microcrystalline | silicates | Variety of chalcedony with alternating bands of black and white. Sardonyx if red and white. |
|