Bustamite and Sapphire Physical Properties

Bustamite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.433.95-4.03

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

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

None, but may exhibit parting

1.7 Mohs Hardness

5.5-69

2 10

1.8 Chemical Composition

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

Al ₂ O ₃

Bustamite and Sapphire Chemical Formula

While comparing Bustamite and Sapphire 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 Sapphire chemical formula.

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

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Bustamite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.