Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.56-2.60
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Absent
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
6.5-76-6.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8