Spinel and Bustamite Physical Properties

Spinel

Bustamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.32-3.43

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

85.5-6

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Bustamite Chemical Formula

While comparing Spinel 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 Spinel and Bustamite chemical formula.

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

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Spinel and Bustamite Specific Gravity

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