Demantoid and Allanite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
3.77-3.95
  
3.40-4.20
  
Fracture
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Cleavage
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Mohs Hardness
6.5
  
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Chemical Composition
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
  
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Demantoid and Allanite Chemical Formula
While comparing Demantoid and Allanite 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 Allanite chemical formula.
- Chemical formula of Demantoid- Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
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Demantoid and Allanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Demantoid and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Demantoid and Allanite Optical Properties during the identification of gemstone. Specific gravity of Demantoid is 3.40-4.20 whereas that of Allanite is 3.40-4.20.