Bustamite and Spinel Physical Properties

Bustamite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.433.64-3.66

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

5.5-68

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Bustamite and Spinel Chemical Formula

While comparing Bustamite and Spinel 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 Spinel chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

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Bustamite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.