Anorthite and Atacamite Physical Properties

Anorthite

Atacamite

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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

2.773.745-3.776

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Conchoidal, Conchoidal, Brittle

1.6 Cleavage

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

Perfect on {010}, fair on {101}

1.7 Mohs Hardness

6-6.53-3.5

2 10

1.8 Chemical Composition

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

Cu2Cl(OH)3

Anorthite and Atacamite Chemical Formula

While comparing Anorthite and Atacamite 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 Atacamite chemical formula.

Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Atacamite- Cu2Cl(OH)3

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Anorthite and Atacamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anorthite and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.