Tenacity
-
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.362.56-2.60
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Uneven, ConchoidalWalter Schumann
Cleavage
[110] perfect, [101] good, [010] distinct
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
3.5-46-6.5
2
10
👆🏻
Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8