Gypsum and Almandine Physical Properties

Gypsum

Almandine

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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

2.20-2.403.95-4.30

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Perfect on {010}, distinct on {100}

none

1.7 Mohs Hardness

27-7.5

2 10

1.8 Chemical Composition

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

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

Gypsum and Almandine Chemical Formula

While comparing Gypsum and Almandine 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 Almandine chemical formula.

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

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Gypsum and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gypsum and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Almandine Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 3.95-4.30 whereas that of Almandine is 3.95-4.30.