Bustamite and Pyrophyllite Physical Properties

Bustamite

Pyrophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.432.65-2.90

1 7.18

1.5 Fracture

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

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

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

{001} Perfect

1.7 Mohs Hardness

5.5-6Not Available

2 10

1.8 Chemical Composition

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

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

Bustamite and Pyrophyllite Chemical Formula

While comparing Bustamite 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 Bustamite and Pyrophyllite chemical formula.

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

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Bustamite and Pyrophyllite Specific Gravity

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