1 Physical Properties
1.2 Tenacity
1.4 Solubility
Not Available
Not Available
1.7 Durability
Not Available
Not Available
1.10 Specific Gravity
2.56-2.603.70-4.10
1
7.18
1.17 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
1.18 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
none
1.19 Mohs Hardness
1.20 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)