Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.92.27-2.33
1
7.18
👆🏻
Fracture
Fibrous
-
Cleavage
[010] Perfect, [100] Distinct, [011] Distinct
Perfect
Mohs Hardness
25.5-6
2
10
👆🏻
Chemical Composition
Amethyst, Clear Quartz, Smoky Quartz, Cacoxenite, Rutile, Geothite, Lepidocrocite
Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)