Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Gelatinises in acids
Durability
Not Available
Not Available
Specific Gravity
2.55-2.57
2.4-2.5
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Uneven, Conchoidal, Brittle
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Distinct on {110}
Mohs Hardness
6-6.5
5-6
Chemical Composition
KAlSi3O8
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
