Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.562.60-2.65
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
{110} Perfect, {010} Indistinct
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)