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Forsterite
Forsterite

Polyhalite
Polyhalite



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Forsterite
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Polyhalite

Forsterite and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.23-3.26
Conchoidal
Perfect on {010} imperfect on {100}
6.5-7
Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Forsterite and Polyhalite Chemical Formula

While comparing Forsterite 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 Forsterite and Polyhalite chemical formula.

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Forsterite and Polyhalite Specific Gravity

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