1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Gelatinises in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Conchoidal, Brittle
1.6 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Distinct on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2