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Anhydrite
Anhydrite

Aragonite
Aragonite



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Anhydrite
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Aragonite

Anhydrite and Aragonite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Dilute acid

Durability

-
-

Specific Gravity

2.90-2.982.93-2.96
1 7.18
👆🏻

Fracture

Conchoidal
Subconchoidal, Conchoidal

Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Distinct on {010}, imperfect {110} and {011}

Mohs Hardness

3.53.5-4
2 10
👆🏻

Chemical Composition

CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references
CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Anhydrite and Aragonite Chemical Formula

While comparing Anhydrite and Aragonite 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 Anhydrite and Aragonite chemical formula.

  • Chemical formula of Anhydrite- CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references
  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Anhydrite and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.