Pyrophyllite and Hercynite Physical Properties

Pyrophyllite

Hercynite

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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

2.65-2.904.39

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

ConchoidalGemdat.org, Uneven

1.6 Cleavage

{001} Perfect

{111} Indistinct, {111} Indistinct, {111} Indistinct

1.7 Mohs Hardness

Not Available7.5-8

2 10

1.8 Chemical Composition

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

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Pyrophyllite and Hercynite Chemical Formula

While comparing Pyrophyllite and Hercynite 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 Hercynite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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Pyrophyllite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 4.39 whereas that of Hercynite is 4.39.