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Neptunite
Neptunite

Calcite
Calcite



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Neptunite
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Calcite

Neptunite and Calcite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

3.19-3.232.67-2.73
1 7.18
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Fracture

Conchoidal
Conchoidal

Cleavage

{110} good
Perfect on [10 1 1] three directions with angle of 74° 55

Mohs Hardness

5-63
2 10
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Chemical Composition

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)
CaCO 3Ulrich Henn and Claudio C.

Neptunite and Calcite Chemical Formula

While comparing Neptunite and Calcite 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 Calcite chemical formula.

  • Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

Neptunite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Neptunite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.