Anorthite and Petalite Physical Properties
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.77
2.40
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
Perfect [001] good [010] poor [110]
Perfect on {001}, poor on {201} with 38.5° angle between the two
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Anorthite and Petalite Chemical Formula
While comparing Anorthite and Petalite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Anorthite and Petalite chemical formula.
- Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Anorthite and Petalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Anorthite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 2.40 whereas that of Petalite is 2.40.