Dolomite and Aragonite Physical Properties

Dolomite

Aragonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Poorly soluble in dilute HCl

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.952.93-2.96

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Perfect on {10 1 1}, rhombohedral cleavage

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

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Dolomite and Aragonite Chemical Formula

While comparing Dolomite 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 Dolomite and Aragonite chemical formula.

Chemical formula of Dolomite- CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dolomite and Aragonite Specific Gravity

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