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Corundum
Corundum

Adamite
Adamite



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Corundum and Adamite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
insoluble
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.90-4.05
4.32-4.48
1.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
1.6 Cleavage
None – parting in 3 directions
{101}, good; {010}, poor
1.7 Mohs Hardness
9
3.5
1.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Corundum and Adamite Chemical Formula

While comparing Corundum and Adamite 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 Corundum and Adamite chemical formula.

  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Corundum and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Adamite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 4.32-4.48 whereas that of Adamite is 4.32-4.48.