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Gahnite
Gahnite

Topaz
Topaz



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Gahnite
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Topaz

Gahnite and Topaz Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
4.00-4.623.49-3.57
Amber
1 7.18
1.5 Fracture
Conchoidal, Uneven
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.6 Cleavage
Indistinct parting on [111]
[001] Perfect
1.7 Mohs Hardness
7.5-88
Amber
2 10
1.8 Chemical Composition
ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)
Al2SiO4(F,OH)2

Gahnite and Topaz Chemical Formula

While comparing Gahnite and Topaz 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 Gahnite and Topaz chemical formula.

  • Chemical formula of Gahnite- ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Topaz- Al2SiO4(F,OH)2

Gahnite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.