Tenacity
Brittle
Brittle
Solubility
Readily soluble in HF
-
Durability
-
-
Specific Gravity
2.86-2.943.82-3.97
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Conchoidal
Cleavage
None observed
Perfect on [001] and [011]
Mohs Hardness
6.5-75.5-6
2
10
👆🏻
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references