1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.56-2.603.95-4.03
1
7.18
1.8 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.9 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
None, but may exhibit parting
1.10 Mohs Hardness
1.12 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Al 2 O 3