Kyanite and Calcite Physical Properties

Kyanite

Calcite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.65

2.67-2.73

1.5 Fracture

Splintery, Brittle, Metallic

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

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

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

1.7 Mohs Hardness

4-7

1.8 Chemical Composition

Not Available

CaCO 3Ulrich Henn and Claudio C.

Kyanite and Calcite Chemical Formula

While comparing Kyanite 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 Kyanite and Calcite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Kyanite and Calcite Specific Gravity

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