Erythrite and Sardonyx Physical Properties

Erythrite

Sardonyx

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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

3.062.55-2.70

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 Available6.5-7

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

SiO 2Ulrich Henn and Claudio C.

Erythrite and Sardonyx Chemical Formula

While comparing Erythrite and Sardonyx 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 Sardonyx chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.

Compare Red Gemstones

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Erythrite Vs Stolzite

Erythrite Vs Polyhalite

Erythrite and Sardonyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Sardonyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Sardonyx Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.55-2.70 whereas that of Sardonyx is 2.55-2.70.