Erythrite and Star Sapphire Physical Properties

Erythrite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.063.90-4.05

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

Not AvailableNot Available

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

Al 2O 3Ulrich Henn and Claudio C.

Erythrite and Star Sapphire Chemical Formula

While comparing Erythrite and Star Sapphire 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 Star Sapphire chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Compare Red Gemstones

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Erythrite Vs Polyhalite

Erythrite Vs Stolzite

Erythrite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.