Phlogopite and Bustamite Physical Properties

Phlogopite

Bustamite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.853.32-3.43

1 7.18

1.5 Fracture

None, Uneven

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

1.6 Cleavage

Perfect basal (001)

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

1.7 Mohs Hardness

2-2.55.5-6

2 10

1.8 Chemical Composition

Not Available

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

Phlogopite and Bustamite Chemical Formula

While comparing Phlogopite 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 Phlogopite and Bustamite chemical formula.

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

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Phlogopite and Bustamite Specific Gravity

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