Tanzanite and Gahnite Physical Properties

Tanzanite

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.354.00-4.62

1 7.18

1.5 Fracture

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

Conchoidal, Uneven

1.6 Cleavage

Perfect {010}, imperfect {100}

Indistinct parting on [111]

1.7 Mohs Hardness

6.5-77.5-8

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Tanzanite and Gahnite Chemical Formula

While comparing Tanzanite 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 Tanzanite and Gahnite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Tanzanite and Gahnite Specific Gravity

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