Anorthite and Purpurite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.77
3.2-3.4
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect [001] good [010] poor [110]
[100] [001] perfect
Mohs Hardness
6-6.5
4-4.5
Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Anorthite and Purpurite Chemical Formula
While comparing Anorthite and Purpurite 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 Purpurite chemical formula.
- Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Anorthite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Anorthite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.