Gypsum and Pyrophyllite Physical Properties

Gypsum

Pyrophyllite

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Physical Properties

Tenacity

Flexible

Solubility

Soluble

Durability

Specific Gravity

2.20-2.402.65-2.90

1 7.18

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Fracture

Conchoidal, Splintery, Fibrous

Cleavage

Perfect on {010}, distinct on {100}

{001} Perfect

Mohs Hardness

2-9999

2 10

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Chemical Composition

CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

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

Gypsum and Pyrophyllite Chemical Formula

While comparing Gypsum 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 Gypsum and Pyrophyllite chemical formula.

Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Colorless Gems

Gypsum Vs Muscovite

Gypsum Vs Oligoclase

Gypsum Vs Orthoclase

Gypsum and Pyrophyllite Specific Gravity

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