1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.28-3.385.50-5.90
1
7.18
1.5 Fracture
Splintery, UnevenArthur Thomas, Difficult, Fibrous
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.6 Cleavage
Good on [110]
On {10 1 0}, perfect; parting on {000 1 }
1.7 Mohs Hardness
1.8 Chemical Composition
NaAlSi 2O 6Ulrich Henn and Claudio C.
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)