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Anorthite
Anorthite

Polyhalite
Polyhalite



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Anorthite
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Polyhalite

Anorthite and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.77
Uneven
Perfect [001] good [010] poor [110]
6-6.5
CaAl 2Si 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Anorthite and Polyhalite Chemical Formula

While comparing Anorthite and Polyhalite 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 Polyhalite chemical formula.

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Anorthite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anorthite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite Vs Polyhalite during the identification of gemstone. Specific gravity of Anorthite is whereas that of Polyhalite is .