|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | tridymite | 7.00 | parallel | Uneven | Transparent | none | 2.00 | glassy | white | white | tabular | silicates | A polymorph of quartz formed by sublimation in cavities of felsic volcanic rock. |
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