Aragonite and Apatite Physical Properties

Aragonite

Apatite

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Physical Properties

Tenacity

Brittle

Solubility

Dilute acid

Durability

Specific Gravity

2.93-2.963.16-3.23

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

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

[0001] indistinct, [1010] indistinct

Mohs Hardness

3.5-45

2 10

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Chemical Composition

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

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Aragonite and Apatite Chemical Formula

While comparing Aragonite and Apatite 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 Apatite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Gems for Virgo

Aragonite Vs Tanzanite

Aragonite Vs Variscite

Aragonite Vs Zircon

Aragonite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.