Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.55-3.732.56-2.60
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
none
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
7-7.56-6.5
2
10
👆🏻
Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8