Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.262.56-2.60
1
7.18
👆🏻
Fracture
Splintery, Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
{110} perfect
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8