Bustamite and Opal Physical Properties

Bustamite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Partly soluble in HCl.

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.431.98-2.25

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

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

None

1.7 Mohs Hardness

5.5-65-6.5

2 10

1.8 Chemical Composition

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

SiO₂ · nH₂O

Bustamite and Opal Chemical Formula

While comparing Bustamite and 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 Opal chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Opal- SiO₂ · nH₂O

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Bustamite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Opal Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 1.98-2.25 whereas that of Opal is 1.98-2.25.