Iolite and Erythrite Physical Properties

Iolite

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.73.06

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

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

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Co3(AsO4)2•8(H2O)

Iolite and Erythrite Chemical Formula

While comparing Iolite 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 Iolite and Erythrite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Iolite and Erythrite Specific Gravity

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