Cordierite and Diaspore Physical Properties

Cordierite

Diaspore

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1 Physical Properties

1.1 Tenacity

Brittle

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.30-3.40

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

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

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Diaspore Chemical Formula

While comparing Cordierite 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 Cordierite and Diaspore chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Cordierite and Diaspore Specific Gravity

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