Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.102.9
1
7.18
👆🏻
Fracture
Uneven
Fibrous
Cleavage
None
[010] Perfect, [100] Distinct, [011] Distinct
Mohs Hardness
-99992
2
10
👆🏻
Chemical Composition
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Amethyst, Clear Quartz, Smoky Quartz, Cacoxenite, Rutile, Geothite, Lepidocrocite