Erythrite and Dumortierite Physical Properties

Erythrite

Dumortierite

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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

3.063.26-3.41

1 7.18

1.5 Fracture

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

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

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

Distinct on {100}, poor on {110}; parting on {001}

1.7 Mohs Hardness

Not Available7-8.5

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

AlAl₆O₃BSi₃O₁₈

Erythrite and Dumortierite Chemical Formula

While comparing Erythrite and Dumortierite 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 Dumortierite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Erythrite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.