Iolite and Gypsum Physical Properties

Iolite

Gypsum

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.20-2.40

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

Perfect on {010}, distinct on {100}

1.7 Mohs Hardness

7-7.52

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Gypsum Chemical Formula

While comparing Iolite and Gypsum 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 Iolite and Gypsum chemical formula.

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

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Iolite and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.