Anorthite and Sellaite Physical Properties

Anorthite

Sellaite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.773.14-3.16

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

1.6 Cleavage

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

Perfect on {010} and {110}

1.7 Mohs Hardness

6-6.55-5.5

2 10

1.8 Chemical Composition

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

MgF 2Ulrich Henn and Claudio C.

Anorthite and Sellaite Chemical Formula

While comparing Anorthite and Sellaite 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 Anorthite and Sellaite chemical formula.

Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Anorthite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anorthite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.