Bustamite and Purpurite Physical Properties

Bustamite

Purpurite

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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

3.32-3.433.2-3.4

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

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

[100] [001] perfect

1.7 Mohs Hardness

5.5-64-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Bustamite and Purpurite Chemical Formula

While comparing Bustamite and Purpurite 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 Purpurite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Bustamite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.