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Polyhalite
Polyhalite

Tanzanite
Tanzanite



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Polyhalite
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Polyhalite and Tanzanite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Soluble
Not Available
1.3 Durability
Not Available
Hard
1.4 Specific Gravity
2.78
3.35
1.5 Fracture
Conchoidal, Brittle
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
Perfect on {10 1 }; parting on {010}
Perfect {010}, imperfect {100}
1.7 Mohs Hardness
3.5
6.5-7
1.8 Chemical Composition
Not Available
Ca2Al3(SiO4)3(OH)

Polyhalite and Tanzanite Chemical Formula

While comparing Polyhalite and Tanzanite 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 Tanzanite chemical formula.

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  • Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)

Polyhalite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.35 whereas that of Tanzanite is 3.35.