Gahnite and Spinel Physical Properties

Gahnite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.623.64-3.66

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Indistinct parting on [111]

None, but may exhibit slight parting

1.7 Mohs Hardness

7.5-88

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Gahnite and Spinel Chemical Formula

While comparing Gahnite and Spinel 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 Spinel chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Spinel- MgAl₂O₄

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Gahnite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.