Pyrophyllite and Rock Crystal Physical Properties

Pyrophyllite

Rock Crystal

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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

2.65-2.902.65

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

{001} Perfect

Not Available

1.7 Mohs Hardness

Not Available7

2 10

1.8 Chemical Composition

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

SiO 2Walter Schumann , Gemstones of the world (2001)

Pyrophyllite and Rock Crystal Chemical Formula

While comparing Pyrophyllite and Rock Crystal 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 Rock Crystal chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

Compare Blue Gemstones

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Pyrophyllite Vs Sard

Pyrophyllite and Rock Crystal Specific Gravity

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