Aragonite and Topaz Physical Properties

Aragonite

Topaz

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Physical Properties

Tenacity

Brittle

Solubility

Dilute acid

Durability

Specific Gravity

2.93-2.963.49-3.57

1 7.18

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Fracture

Subconchoidal, Conchoidal

Subconchoidal, Uneven, Conchoidal

Cleavage

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

[001] Perfect

Mohs Hardness

3.5-48

2 10

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Chemical Composition

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

Al₂SiO₄(F,OH)₂

Aragonite and Topaz Chemical Formula

While comparing Aragonite and Topaz 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 Topaz chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Aragonite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.