Aragonite and Anhydrite Physical Properties

Aragonite

Anhydrite

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Physical Properties

Tenacity

Brittle

Solubility

Dilute acid

Durability

Specific Gravity

2.93-2.962.90-2.98

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}, imperfect {110} and {011}

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

Mohs Hardness

3.5-43.5

2 10

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Chemical Composition

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Aragonite and Anhydrite Chemical Formula

While comparing Aragonite 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 Aragonite and Anhydrite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael 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 Gems for Virgo

Aragonite Vs Tanzanite

Aragonite Vs Variscite

Aragonite Vs Zircon

Aragonite and Anhydrite Specific Gravity

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