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Nepouite
Nepouite

Pyrope
Pyrope



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Nepouite
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Pyrope

Nepouite and Pyrope Physical Properties

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Physical Properties

Tenacity

-
-

Solubility

-
insoluble in water

Durability

-
-

Specific Gravity

3.18-3.243.62-3.87
1 7.18
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Fracture

-
Conchoidal

Cleavage

perfect on {001}
None

Mohs Hardness

27-7.5
2 10
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Chemical Composition

Ni3(Si2O5)(OH)4
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Nepouite and Pyrope Chemical Formula

While comparing Nepouite and Pyrope 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 Nepouite and Pyrope chemical formula.

  • Chemical formula of Nepouite- Ni3(Si2O5)(OH)4
  • Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Nepouite and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepouite and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepouite and Pyrope Optical Properties during the identification of gemstone. Specific gravity of Nepouite is 3.62-3.87 whereas that of Pyrope is 3.62-3.87.