Gahnite and Tanzanite Physical Properties

Gahnite

Tanzanite

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1 Physical Properties

2.2 Tenacity

Not Available

2.4 Solubility

Not Available

2.6 Durability

Not Available

Hard

2.7 Specific Gravity

4.00-4.623.35

1 7.18

2.8 Fracture

Conchoidal, Uneven

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

2.9 Cleavage

Indistinct parting on [111]

Perfect {010}, imperfect {100}

2.10 Mohs Hardness

7.5-86.5-7

2 10

2.14 Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Gahnite and Tanzanite Chemical Formula

While comparing Gahnite and Tanzanite 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 Tanzanite chemical formula.

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

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Gahnite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.35 whereas that of Tanzanite is 3.35.