Aragonite and Austinite Physical Properties

Aragonite

Austinite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Dilute acid

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.964.12

1 7.18

1.5 Fracture

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

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

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

Good in two directions parallel to the prism faces {110}

1.7 Mohs Hardness

3.5-44-4.5

2 10

1.8 Chemical Composition

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

CaZn(AsO4)(OH)

Aragonite and Austinite Chemical Formula

While comparing Aragonite and Austinite 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 Austinite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Aragonite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 4.12 whereas that of Austinite is 4.12.