Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
1.97-2.223.82-3.97
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
None
Perfect on [001] and [011]
Mohs Hardness
6-6.55.5-6
2
10
👆🏻
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references