Plumbogummite and Bustamite Physical Properties

Plumbogummite

Bustamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

4.0143.32-3.43

1 7.18

1.5 Fracture

Uneven, Conchoidal

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

1.6 Cleavage

None

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

1.7 Mohs Hardness

4-55.5-6

2 10

1.8 Chemical Composition

Not Available

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

Plumbogummite and Bustamite Chemical Formula

While comparing Plumbogummite 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 Plumbogummite 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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Plumbogummite and Bustamite Specific Gravity

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