1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.5 Solubility
Not Available
Not Available
1.7 Durability
Not Available
Not Available
1.10 Specific Gravity
2.56-2.603.28-3.31
1
7.18
1.16 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.17 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
None observed
1.18 Mohs Hardness
1.19 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.