Erythrite and Kyanite Physical Properties

Erythrite

Kyanite

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1 Physical Properties

1.1 Tenacity

Sectile

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.063.53-3.65

1 7.18

1.5 Fracture

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

Splintery, Brittle, Metallic

1.6 Cleavage

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

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

1.7 Mohs Hardness

Not Available4-7

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

Not Available

Erythrite and Kyanite Chemical Formula

While comparing Erythrite and Kyanite 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 Kyanite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Erythrite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.