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Mottramite
Mottramite

Pyrope
Pyrope



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Mottramite
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Pyrope

Mottramite and Pyrope Physical Properties

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Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
insoluble in water

Durability

-
-

Specific Gravity

5.93.62-3.87
1 7.18
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Fracture

Sub-Conchoidal
Conchoidal

Cleavage

None observed
None

Mohs Hardness

37-7.5
2 10
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Chemical Composition

PbCu(VO4)(OH)
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Mottramite and Pyrope Chemical Formula

While comparing Mottramite 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 Mottramite and Pyrope chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Mottramite and Pyrope Specific Gravity

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