Almandine and Aragonite Physical Properties

Almandine

Aragonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.302.93-2.96

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.53.5-4

2 10

1.8 Chemical Composition

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

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

Almandine and Aragonite Chemical Formula

While comparing Almandine 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 Almandine and Aragonite chemical formula.

Chemical formula of Almandine- Fe 3Al 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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Almandine Vs Aragonite

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Almandine and Aragonite Specific Gravity

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