Sellaite and Anorthite Physical Properties

Sellaite

Anorthite

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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

3.14-3.162.77

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect on {010} and {110}

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

1.7 Mohs Hardness

5-5.56-6.5

2 10

1.8 Chemical Composition

MgF 2Ulrich Henn and Claudio C.

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

Sellaite and Anorthite Chemical Formula

While comparing Sellaite 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 Sellaite and Anorthite chemical formula.

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

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Sellaite and Anorthite Specific Gravity

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