Gypsum and Aragonite Physical Properties

Gypsum

Aragonite

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1 Physical Properties

1.1 Tenacity

Flexible

Brittle

1.2 Solubility

Soluble

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.402.93-2.96

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Perfect on {010}, distinct on {100}

Distinct on {010}, imperfect {110} and {011}

1.7 Mohs Hardness

23.5-4

2 10

1.8 Chemical Composition

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

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Gypsum and Aragonite Chemical Formula

While comparing Gypsum and Aragonite 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 Aragonite chemical formula.

Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Gypsum and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gypsum and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.