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Corundum
Corundum

Albite
Albite



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Corundum
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Corundum and Albite 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
2.60-2.65
1.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
1.6 Cleavage
None – parting in 3 directions
Perfect on {001}, very good on {010}, imperfect on {110}
1.7 Mohs Hardness
9
6-6.5
1.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
NaAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Corundum and Albite Chemical Formula

While comparing Corundum and Albite 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 Albite chemical formula.

  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Albite- NaAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Corundum and Albite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Albite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.60-2.65 whereas that of Albite is 2.60-2.65.

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