Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.56-2.602.93-2.96
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann
Subconchoidal, Conchoidal
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
6-6.53.5-4
2
10
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Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references