Pyrophyllite and Kyanite Physical Properties

Pyrophyllite

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.903.53-3.65

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Splintery, Brittle, Metallic

1.6 Cleavage

{001} Perfect

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

Not Available4-7

2 10

1.8 Chemical Composition

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

Not Available

Pyrophyllite and Kyanite Chemical Formula

While comparing Pyrophyllite and Kyanite 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 Kyanite chemical formula.

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

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Pyrophyllite Vs Scorzalite

Pyrophyllite Vs Sardonyx

Pyrophyllite Vs Sard

Pyrophyllite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.