1 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.4 Solubility
Not Available
Not Available
2.6 Durability
Not Available
Not Available
2.7 Specific Gravity
3.26-3.412.62-2.65
1
7.18
2.8 Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gemstones of the world (2001)
2.9 Cleavage
Distinct on {100}, poor on {110}; parting on {001}
001
2.10 Mohs Hardness
2.14 Chemical Composition
AlAl6O3BSi3O18
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8