Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.102.56-2.60
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
[100] Perfect, [110] Good, [011] Distinct
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
66-6.5
2
10
👆🏻
Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8