Calcite and Austinite Physical Properties

Calcite

Austinite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.734.12

1 7.18

1.5 Fracture

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

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

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

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

1.7 Mohs Hardness

34-4.5

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

CaZn(AsO4)(OH)

Calcite and Austinite Chemical Formula

While comparing Calcite 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 Calcite and Austinite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Calcite and Austinite Specific Gravity

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