Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
2.62-2.655.00-5.20
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
001
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
66-6.5
2
10
👆🏻
Chemical Composition
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references