Anorthite and Sunstone Physical Properties

Anorthite

Sunstone

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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

2.772.62-2.65

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Gemstones of the world (2001)

1.6 Cleavage

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

001

1.7 Mohs Hardness

6-6.56

2 10

1.8 Chemical Composition

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

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Anorthite and Sunstone Chemical Formula

While comparing Anorthite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Anorthite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anorthite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.