Dumortierite and Bytownite Physical Properties

Dumortierite

Bytownite

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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

3.26-3.412.72-2.75

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 on [001], good on [010], imperfect on [110]

1.7 Mohs Hardness

7-8.56-6.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Dumortierite and Bytownite Chemical Formula

While comparing Dumortierite and Bytownite 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 Bytownite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Dumortierite and Bytownite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Bytownite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Bytownite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.72-2.75 whereas that of Bytownite is 2.72-2.75.