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Aragonite
Aragonite

Andradite
Andradite



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Aragonite
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Andradite

Aragonite and Andradite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Dilute acid
-

Durability

-
-

Specific Gravity

2.93-2.963.70-4.10
1 7.18
👆🏻

Fracture

Subconchoidal, Conchoidal
Conchoidal, Uneven

Cleavage

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

Mohs Hardness

3.5-46.5-7
2 10
👆🏻

Chemical Composition

CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Aragonite and Andradite Chemical Formula

While comparing Aragonite and Andradite 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 Andradite chemical formula.

  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Aragonite and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.