Aragonite and Dolomite Physical Properties

Aragonite

Dolomite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Dilute acid

Poorly soluble in dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.962.80-2.95

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

Perfect on {10 1 1}, rhombohedral cleavage

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

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

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

Aragonite and Dolomite Chemical Formula

While comparing Aragonite and Dolomite 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 Dolomite chemical formula.

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

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Aragonite and Dolomite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Dolomite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Dolomite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.80-2.95 whereas that of Dolomite is 2.80-2.95.