Erythrite and Calcite Physical Properties

Erythrite

Calcite

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1 Physical Properties

1.1 Tenacity

Sectile

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.062.67-2.73

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

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

1.7 Mohs Hardness

Not Available3

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

CaCO 3Ulrich Henn and Claudio C.

Erythrite and Calcite Chemical Formula

While comparing Erythrite 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 Erythrite and Calcite chemical formula.

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

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Erythrite and Calcite Specific Gravity

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