Gypsum and Brucite Physical Properties

Gypsum

Brucite

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1 Physical Properties

1.1 Tenacity

Flexible

Sectile

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.402.39

1 7.18

1.5 Fracture

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

Irregular

1.6 Cleavage

Perfect on {010}, distinct on {100}

Perfect on {0001}

1.7 Mohs Hardness

22.5

2 10

1.8 Chemical Composition

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

Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Gypsum and Brucite Chemical Formula

While comparing Gypsum and Brucite 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 Brucite chemical formula.

Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Gypsum and Brucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gypsum and Brucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Brucite Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 2.39 whereas that of Brucite is 2.39.