Gypsum and Iolite Physical Properties

Gypsum

Iolite

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1 Physical Properties

1.1 Tenacity

Flexible

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.402.6-2.7

1 7.18

1.5 Fracture

Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

Perfect on {010}, distinct on {100}

3,1

1.7 Mohs Hardness

27-7.5

2 10

1.8 Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Gypsum and Iolite Chemical Formula

While comparing Gypsum and Iolite 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 Iolite chemical formula.

Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Gypsum and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gypsum and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Iolite Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 2.6-2.7 whereas that of Iolite is 2.6-2.7.