Opal and Bustamite Physical Properties

Opal

Bustamite

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1 Physical Properties

1.1 Tenacity

BrittleWalter Schumann

Not Available

1.2 Solubility

hot salt water

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.253.32-3.43

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

None

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

1.7 Mohs Hardness

5-6.55.5-6

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

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

Opal and Bustamite Chemical Formula

While comparing Opal 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 Opal and Bustamite chemical formula.

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

Compare Semi Precious Gemstones

Opal Vs Lehsunia

Opal Vs Amethyst

Opal Vs Alexandrite

Opal and Bustamite Specific Gravity

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