Pyrophyllite and Willemite Physical Properties

Pyrophyllite

Willemite

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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

2.65-2.903.89-4.18

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

{001} Perfect

{0001}, {11 2 0} imperfect

1.7 Mohs Hardness

Not Available5.5

2 10

1.8 Chemical Composition

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

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Pyrophyllite and Willemite Chemical Formula

While comparing Pyrophyllite and Willemite 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 Willemite chemical formula.

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

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Pyrophyllite and Willemite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Willemite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Willemite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.89-4.18 whereas that of Willemite is 3.89-4.18.