Andradite and Aragonite Physical Properties

Andradite

Aragonite

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Physical Properties

Tenacity

Brittle

Solubility

Dilute acid

Durability

Specific Gravity

3.70-4.102.93-2.96

1 7.18

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Fracture

Conchoidal, Uneven

Subconchoidal, Conchoidal

Cleavage

none

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

Mohs Hardness

6.5-73.5-4

2 10

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Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Andradite and Aragonite Chemical Formula

While comparing Andradite 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 Andradite and Aragonite chemical formula.

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

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Andradite and Aragonite Specific Gravity

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