Colemanite and Anhydrite Physical Properties

Colemanite

Anhydrite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.40-2.422.90-2.98

1 7.18

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Fracture

Conchoidal

Cleavage

{010} Perfect, {001} Distinct

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

Mohs Hardness

4.53.5

2 10

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Chemical Composition

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

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Colemanite and Anhydrite Chemical Formula

While comparing Colemanite and Anhydrite 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 Colemanite and Anhydrite chemical formula.

Chemical formula of Colemanite- Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Colorless Gems

Colemanite Vs Herderite

Colemanite Vs Hibschite

Colemanite Vs Hyalite

Colemanite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Colemanite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Colemanite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Colemanite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.