Aragonite and Pollucite Physical Properties

Aragonite

Pollucite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Dilute acid

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.962.86-2.94

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

None observed

1.7 Mohs Hardness

3.5-46.5-7

2 10

1.8 Chemical Composition

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

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Aragonite and Pollucite Chemical Formula

While comparing Aragonite and Pollucite 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 Pollucite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Aragonite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.