Dumortierite and Anorthite Physical Properties

Dumortierite

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

3.26-3.412.77

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

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

1.7 Mohs Hardness

7-8.56-6.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

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

Dumortierite and Anorthite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Anorthite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Dumortierite and Anorthite Specific Gravity

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