Neptunite and Aragonite Physical Properties

Neptunite

Aragonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Dilute acid

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.232.93-2.96

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

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

1.6 Cleavage

{110} good

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

1.7 Mohs Hardness

5-63.5-4

2 10

1.8 Chemical Composition

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Neptunite and Aragonite Chemical Formula

While comparing Neptunite 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 Neptunite and Aragonite chemical formula.

Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Neptunite and Aragonite Specific Gravity

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