Erythrite and Diaspore Physical Properties

Erythrite

Diaspore

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1 Physical Properties

1.1 Tenacity

Sectile

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.063.30-3.40

1 7.18

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

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

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Erythrite and Diaspore Chemical Formula

While comparing Erythrite and Diaspore 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 Diaspore chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Erythrite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.