Alexandrite and Gahnite Physical Properties

Alexandrite

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.814.00-4.62

1 7.18

1.5 Fracture

Not Available

Conchoidal, Uneven

1.6 Cleavage

1,1 ; 3,2.

Indistinct parting on [111]

1.7 Mohs Hardness

8.57.5-8

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Alexandrite and Gahnite Chemical Formula

While comparing Alexandrite and Gahnite 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 Gahnite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Scorpio

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Alexandrite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.