Ruby and Erythrite Physical Properties

Ruby

Erythrite

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1 Physical Properties

1.1 Tenacity

Brittle

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.06

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

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

1.7 Mohs Hardness

9Not Available

2 10

1.8 Chemical Composition

Al ₂ O ₃

Co3(AsO4)2•8(H2O)

Ruby and Erythrite Chemical Formula

While comparing Ruby 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 Ruby and Erythrite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Ruby and Erythrite Specific Gravity

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