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Aragonite
Aragonite

Sard
Sard



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Aragonite
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Sard

Aragonite and Sard Physical Properties

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Physical Properties

Tenacity

Brittle
-

Solubility

Dilute acid
-

Durability

-
-

Specific Gravity

2.93-2.962.58-2.63
1 7.18
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Fracture

Subconchoidal, Conchoidal
Conchoidal

Cleavage

Distinct on {010}, imperfect {110} and {011}
None

Mohs Hardness

3.5-46.5-7
2 10
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Chemical Composition

CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Ulrich Henn and Claudio C.

Aragonite and Sard Chemical Formula

While comparing Aragonite and Sard 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 Sard chemical formula.

  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.

Aragonite and Sard Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Sard Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Sard Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.58-2.63 whereas that of Sard is 2.58-2.63.