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Amethyst
Amethyst

Corundum
Corundum



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Amethyst
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Corundum

Amethyst and Corundum Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
insoluble in common solvents
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.653.90-4.05
Amber
1 7.18
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, Gems, Difficult, Fibrous
1.6 Cleavage
Indiscernible
None – parting in 3 directions
1.7 Mohs Hardness
79
Amber
2 10
1.8 Chemical Composition
SiO2
Al 2O 3Arthur Thomas , Gemstones (2009)

Amethyst and Corundum Chemical Formula

While comparing Amethyst 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 Amethyst and Corundum chemical formula.

  • Chemical formula of Amethyst- SiO2
  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

Amethyst and Corundum Specific Gravity

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