Iolite and Diaspore Physical Properties

Iolite

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.73.30-3.40

1 7.18

1.5 Fracture

Not Available

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

3,1

{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

Iolite and Diaspore Chemical Formula

While comparing Iolite 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 Iolite and Diaspore chemical formula.

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

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Iolite and Diaspore Specific Gravity

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