Dumortierite and Pyrophyllite Physical Properties

Dumortierite

Pyrophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.412.65-2.90

1 7.18

1.5 Fracture

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

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

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

{001} Perfect

1.7 Mohs Hardness

7-8.5Not Available

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Dumortierite and Pyrophyllite Chemical Formula

While comparing Dumortierite and Pyrophyllite 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 Pyrophyllite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dumortierite and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.