Calcite and Cordierite Iolite Physical Properties

Calcite

Cordierite Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.73

2.56-2.66

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Calcite and Cordierite Iolite Chemical Formula

While comparing Calcite and Cordierite Iolite 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 Cordierite Iolite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

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Calcite and Cordierite Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.