Polyhalite and Chalcedony Physical Properties

Polyhalite

Chalcedony

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.55-2.70

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann

1.6 Cleavage

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

Absent

1.7 Mohs Hardness

3.56.5-7

2 10

1.8 Chemical Composition

Not Available

SiO₂

Polyhalite and Chalcedony Chemical Formula

While comparing Polyhalite and Chalcedony 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 Chalcedony chemical formula.

Chemical formula of Chalcedony- SiO₂

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Polyhalite and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.