Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.93.05-3.08
1
7.18
👆🏻
Fracture
Fibrous
Subconchoidal, Uneven, Conchoidal
Cleavage
[010] Perfect, [100] Distinct, [011] Distinct
Poor on {100}
Mohs Hardness
25
2
10
👆🏻
Chemical Composition
Amethyst, Clear Quartz, Smoky Quartz, Cacoxenite, Rutile, Geothite, Lepidocrocite
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)