Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.162.56-2.60
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven, ConchoidalWalter Schumann
Cleavage
distinct/good on {1011}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
4.56-6.5
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8