Dumortierite and Bustamite Physical Properties

Dumortierite

Bustamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.413.32-3.43

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

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

1.7 Mohs Hardness

7-8.55.5-6

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

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

Dumortierite and Bustamite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Bustamite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dumortierite and Bustamite Specific Gravity

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