Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.82-3.972.74-2.90
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Splintery
Cleavage
Perfect on [001] and [011]
Perfect on {100} and {001}
Mohs Hardness
5.5-64.5-5
2
10
👆🏻
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.