Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.58-2.643.87-4.14
1
7.18
👆🏻
Fracture
-
Subconchoidal, Conchoidal
Cleavage
None
Poor on {120}, in traces on {001}
Mohs Hardness
6.5-75.5-6
2
10
👆🏻
Chemical Composition
SiO 2Walter Schumann , Gemstones of the world (2001)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references