Andalusite and Colemanite Physical Properties

Andalusite

Colemanite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.05-3.21

Uneven, Subconchoidal, Splintery

Good on {110}, poor on {100}

7.5

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

2.40-2.42

{010} Perfect, {001} Distinct

4.5

Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Andalusite and Colemanite Chemical Formula

While comparing Andalusite and Colemanite 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 Andalusite and Colemanite chemical formula.

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Andalusite and Colemanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Colemanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite Vs Colemanite during the identification of gemstone. Specific gravity of Andalusite is whereas that of Colemanite is .