Gahnite and Apophyllite KF Physical Properties

Gahnite

Apophyllite KF

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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

4.00-4.622.33-2.37

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Indistinct parting on [111]

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

7.5-84.5-5

2 10

1.8 Chemical Composition

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

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Gahnite and Apophyllite KF Chemical Formula

While comparing Gahnite and Apophyllite KF 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 KF chemical formula.

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

Compare Blue Gemstones

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Gahnite Vs Howlite

Gahnite Vs Hydrogrossular

Gahnite and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.