Pyrophyllite and Gypsum Physical Properties

Pyrophyllite

Gypsum

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.902.20-2.40

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{001} Perfect

Perfect on {010}, distinct on {100}

1.7 Mohs Hardness

Not Available2

2 10

1.8 Chemical Composition

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

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

Pyrophyllite and Gypsum Chemical Formula

While comparing Pyrophyllite and Gypsum 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 Gypsum chemical formula.

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

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Pyrophyllite and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.