Polyhalite and Albite Physical Properties

Polyhalite

Albite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78

2.60-2.65

1.5 Fracture

Conchoidal, Brittle

Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

Perfect on {001}, very good on {010}, imperfect on {110}

1.7 Mohs Hardness

3.5

6-6.5

1.8 Chemical Composition

Not Available

NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Polyhalite and Albite Chemical Formula

While comparing Polyhalite and Albite 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 Polyhalite and Albite chemical formula.

Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Red Gemstones

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Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite and Albite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Albite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.60-2.65 whereas that of Albite is 2.60-2.65.