Bustamite and Black Opal Physical Properties

Bustamite

Black Opal

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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

3.32-3.431.97-2.22

1 7.18

1.5 Fracture

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

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

5.5-66-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Bustamite and Black Opal Chemical Formula

While comparing Bustamite and Black Opal 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 Black Opal chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Bustamite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.