Pyrophyllite and Bustamite Physical Properties

Pyrophyllite

Bustamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.903.32-3.43

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{001} Perfect

{100} perfect; {110} and {1 1 0} good; {010} poor

1.7 Mohs Hardness

Not Available5.5-6

2 10

1.8 Chemical Composition

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

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Pyrophyllite and Bustamite Chemical Formula

While comparing Pyrophyllite and Bustamite 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 Bustamite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Pyrophyllite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.