Gahnite and Apophyllite Physical Properties

Gahnite

Apophyllite

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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

4.00-4.622.30-2.50

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Indistinct parting on [111]

Perfect on (001)

1.7 Mohs Hardness

7.5-84.5-5

2 10

1.8 Chemical Composition

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

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Gahnite and Apophyllite Chemical Formula

While comparing Gahnite and Apophyllite 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 Apophyllite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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Gahnite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.