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Demantoid
Demantoid

Corundum
Corundum



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Demantoid
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Demantoid and Corundum Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.77-3.95
3.90-4.05
1.5 Fracture
Not Available
Uneven, Uneven, Gems, Difficult, Fibrous
1.6 Cleavage
Not Available
None – parting in 3 directions
1.7 Mohs Hardness
6.5
9
1.8 Chemical Composition
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
Al 2O 3Arthur Thomas , Gemstones (2009)

Demantoid and Corundum Chemical Formula

While comparing Demantoid and Corundum 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 Demantoid and Corundum chemical formula.

  • Chemical formula of Demantoid- Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

Demantoid and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Demantoid and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Demantoid and Corundum Optical Properties during the identification of gemstone. Specific gravity of Demantoid is 3.90-4.05 whereas that of Corundum is 3.90-4.05.