Gypsum and Chalcedony Physical Properties

Gypsum

Chalcedony

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Physical Properties

Tenacity

Flexible

Solubility

Soluble

Durability

Specific Gravity

2.20-2.402.55-2.70

1 7.18

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Fracture

Conchoidal, Splintery, Fibrous

Uneven, Splintery, Conchoidal

Cleavage

Perfect on {010}, distinct on {100}

Absent

Mohs Hardness

26.5-7

2 10

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Chemical Composition

CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

SiO₂

Gypsum and Chalcedony Chemical Formula

While comparing Gypsum 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 Gypsum and Chalcedony chemical formula.

Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Chalcedony- SiO₂

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Gypsum and Chalcedony Specific Gravity

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