1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.56-2.602.35-2.36
1
7.18
1.4 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Not Available
1.5 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
{???} Indistinct
1.6 Mohs Hardness
1.9 Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Ca 3B 6O 6(OH) 12 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)