Apophyllite KF and Gahnite Physical Properties

Apophyllite KF

Gahnite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.33-2.374.00-4.62

1 7.18

1.5 Fracture

Uneven, Brittle, Uneven, Brittle, Uneven

Conchoidal, Uneven

1.6 Cleavage

Perfect on {001}, imperfect on {110}

Indistinct parting on [111]

1.7 Mohs Hardness

4.5-57.5-8

2 10

1.8 Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

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

Apophyllite KF and Gahnite Chemical Formula

While comparing Apophyllite KF 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 Apophyllite KF and Gahnite chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

Apophyllite KF Vs Hauyne

Apophyllite KF Vs Langbeinite

Apophyllite KF Vs Nepouite

Apophyllite KF and Gahnite Specific Gravity

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