Pyrophyllite and Fluorite Physical Properties

Pyrophyllite

Fluorite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

2.65-2.903.00-3.25

1 7.18

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Fracture

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

{001} Perfect

Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

-99994

2 10

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Chemical Composition

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

CaF₂

Pyrophyllite and Fluorite Chemical Formula

While comparing Pyrophyllite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fluorite- CaF₂

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Pyrophyllite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.