Calcite and Erythrite Physical Properties

Calcite

Erythrite

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1 Physical Properties

1.1 Tenacity

Brittle

Sectile

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.733.06

1 7.18

1.5 Fracture

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

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

1.6 Cleavage

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

Perfect on {010}; poor on {100} and { 1 02}.

1.7 Mohs Hardness

3Not Available

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

Co3(AsO4)2•8(H2O)

Calcite and Erythrite Chemical Formula

While comparing Calcite and Erythrite 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 Erythrite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Calcite and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.06 whereas that of Erythrite is 3.06.