Tenacity
Brittle
Brittle
Solubility
Readily soluble in HF
-
Durability
-
-
Specific Gravity
2.86-2.945.50-5.90
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
None observed
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
6.5-74
2
10
👆🏻
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)