Dumortierite and Phlogopite Physical Properties

Dumortierite

Phlogopite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.412.78-2.85

1 7.18

1.13 Fracture

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

None, Uneven

2.2 Cleavage

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

Perfect basal (001)

2.4 Mohs Hardness

7-8.52-2.5

2 10

2.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Not Available

Dumortierite and Phlogopite Chemical Formula

While comparing Dumortierite and Phlogopite 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 Phlogopite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Dumortierite and Phlogopite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Phlogopite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Phlogopite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.78-2.85 whereas that of Phlogopite is 2.78-2.85.