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Brucite
Brucite

Polyhalite
Polyhalite



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Brucite
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Polyhalite

Brucite and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Sectile
-
-
2.39
Irregular
Perfect on {0001}
2.5
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Brucite and Polyhalite Chemical Formula

While comparing Brucite 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 Brucite and Polyhalite chemical formula.

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Brucite and Polyhalite Specific Gravity

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