Pyrophyllite and Dumortierite Physical Properties

Pyrophyllite

Dumortierite

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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

2.65-2.903.26-3.41

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

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

1.6 Cleavage

{001} Perfect

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

1.7 Mohs Hardness

Not Available7-8.5

2 10

1.8 Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Pyrophyllite and Dumortierite Chemical Formula

While comparing Pyrophyllite and Dumortierite 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 Pyrophyllite and Dumortierite chemical formula.

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

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Pyrophyllite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.