Apophyllite and Anorthite Physical Properties

Apophyllite

Anorthite

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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

2.30-2.502.77

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect on (001)

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

4.5-56-6.5

2 10

1.8 Chemical Composition

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

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Apophyllite and Anorthite Chemical Formula

While comparing Apophyllite and Anorthite 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 and Anorthite chemical formula.

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

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Apophyllite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 2.77 whereas that of Anorthite is 2.77.