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Ruby
Ruby

Mottramite
Mottramite



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Ruby
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Mottramite

Ruby and Mottramite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

3.97-4.055.9
1 7.18
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Fracture

Conchoidal
Sub-Conchoidal

Cleavage

No true cleavage
None observed

Mohs Hardness

93
2 10
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Chemical Composition

Al 2 O 3
PbCu(VO4)(OH)

Ruby and Mottramite Chemical Formula

While comparing Ruby 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 Ruby and Mottramite chemical formula.

  • Chemical formula of Ruby- Al 2 O 3
  • Chemical formula of Mottramite- PbCu(VO4)(OH)

Ruby and Mottramite Specific Gravity

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