1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.3 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.7 Specific Gravity
2.56-2.603.28-3.38
1
7.18
1.10 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Splintery, UnevenArthur Thomas, Difficult, Fibrous
1.12 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Good on [110]
1.14 Mohs Hardness
1.16 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
NaAlSi 2O 6Ulrich Henn and Claudio C.