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Alexandrite
Alexandrite

Bytownite
Bytownite



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Alexandrite and Bytownite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.69-3.81
2.72-2.75
1.5 Fracture
Not Available
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
1,1 ; 3,2.
Perfect on [001], good on [010], imperfect on [110]
1.7 Mohs Hardness
8.5
6-6.5
1.8 Chemical Composition
BeAl 2 O 4
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Alexandrite and Bytownite Chemical Formula

While comparing Alexandrite and Bytownite 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 Alexandrite and Bytownite chemical formula.

  • Chemical formula of Alexandrite- BeAl 2 O 4
  • Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Alexandrite and Bytownite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Bytownite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Bytownite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.72-2.75 whereas that of Bytownite is 2.72-2.75.

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