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Dioptase
Dioptase

Corundum
Corundum



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Dioptase
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Dioptase and Corundum Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Soluble
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.25-3.35
3.90-4.05
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Uneven, Uneven, Gems, Difficult, Fibrous
1.6 Cleavage
Perfect in three directions
None – parting in 3 directions
1.7 Mohs Hardness
5
9
1.8 Chemical Composition
CuSiO 2(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al 2O 3Arthur Thomas , Gemstones (2009)

Dioptase and Corundum Chemical Formula

While comparing Dioptase 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 Dioptase and Corundum chemical formula.

  • Chemical formula of Dioptase- CuSiO 2(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

Dioptase and Corundum Specific Gravity

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