Gahnite and Kyanite Physical Properties

Gahnite

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.623.53-3.65

1 7.18

1.5 Fracture

Conchoidal, Uneven

Splintery, Brittle, Metallic

1.6 Cleavage

Indistinct parting on [111]

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

7.5-84-7

2 10

1.8 Chemical Composition

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

Not Available

Gahnite and Kyanite Chemical Formula

While comparing Gahnite and Kyanite 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 Kyanite chemical formula.

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

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Gahnite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.