Dumortierite and Sylvite Physical Properties

Dumortierite

Sylvite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.411.993

1 7.18

1.5 Fracture

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

Uneven, Brittle

1.6 Cleavage

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

Perfect on [100], [010], [001]

1.7 Mohs Hardness

7-8.52.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Not Available

Dumortierite and Sylvite Chemical Formula

While comparing Dumortierite and Sylvite 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 Sylvite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Dumortierite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 1.993 whereas that of Sylvite is 1.993.