Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.92.7-3.3
1
7.18
👆🏻
Fracture
Fibrous
Uneven, Even
Cleavage
[010] Perfect, [100] Distinct, [011] Distinct
Perfect on the {001}
Mohs Hardness
22.5-3.0
2
10
👆🏻
Chemical Composition
Amethyst, Clear Quartz, Smoky Quartz, Cacoxenite, Rutile, Geothite, Lepidocrocite
K(Mg,Fe++)3[AlSi3O10(OH,F)2