Andradite and Gypsum Physical Properties

Andradite

Gypsum

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1 Physical Properties

1.1 Tenacity

Brittle

Flexible

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.102.20-2.40

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

none

Perfect on {010}, distinct on {100}

1.7 Mohs Hardness

6.5-72

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Andradite and Gypsum Chemical Formula

While comparing Andradite 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 Andradite and Gypsum chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Compare Green Gemstones

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Andradite Vs Aragonite

Andradite and Gypsum Specific Gravity

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