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Almandine
Almandine

Mottramite
Mottramite



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Almandine
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Mottramite

Almandine and Mottramite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

3.95-4.305.9
1 7.18
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Fracture

Conchoidal
Sub-Conchoidal

Cleavage

none
None observed

Mohs Hardness

7-7.53
2 10
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Chemical Composition

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

Almandine and Mottramite Chemical Formula

While comparing Almandine and Mottramite 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 Almandine and Mottramite chemical formula.

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

Almandine and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 5.9 whereas that of Mottramite is 5.9.