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Polyhalite
Polyhalite

Amethyst
Amethyst



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Polyhalite
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Amethyst

Polyhalite and Amethyst Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Soluble
insoluble in common solvents
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.78
2.65
1.5 Fracture
Conchoidal, Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
Perfect on {10 1 }; parting on {010}
Indiscernible
1.7 Mohs Hardness
3.5
7
1.8 Chemical Composition
Not Available
SiO2

Polyhalite and Amethyst Chemical Formula

While comparing Polyhalite and Amethyst 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 Amethyst chemical formula.

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  • Chemical formula of Amethyst- SiO2

Polyhalite and Amethyst Specific Gravity

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

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