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Labradorite
Labradorite

Polyhalite
Polyhalite



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Labradorite
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Polyhalite

Labradorite and Polyhalite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.69-2.72
2.78
1.5 Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Conchoidal, Brittle
1.6 Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Perfect on {10 1 }; parting on {010}
1.7 Mohs Hardness
6-6.5
3.5
1.8 Chemical Composition
(Na,Ca)1-2Si3-2O8
Not Available

Labradorite and Polyhalite Chemical Formula

While comparing Labradorite 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 Labradorite and Polyhalite chemical formula.

  • Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
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Labradorite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 2.78 whereas that of Polyhalite is 2.78.