Aragonite and Calcite Physical Properties

Aragonite

Calcite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Dilute acid

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.962.67-2.73

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

Perfect on [10 1 1] three directions with angle of 74° 55

1.7 Mohs Hardness

3.5-43

2 10

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Aragonite and Calcite Chemical Formula

While comparing Aragonite and Calcite 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 Aragonite and Calcite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Aragonite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.