1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.8 Fracture
Conchoidal, Brittle
Uneven, Uneven, Gems, Sixth Edition (2006)
1.9 Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
From the Greek for oblique and fracture, descriptive of the cleavage
1.10 Mohs Hardness
1.5 Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)