Blue John and Bustamite Physical Properties

Blue John

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

3.00-3.253.32-3.43

1 7.18

2.5 Fracture

Not Available

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

2.6 Cleavage

Not Available

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

2.7 Mohs Hardness

Not Available5.5-6

2 10

2.11 Chemical Composition

CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Blue John and Bustamite Chemical Formula

While comparing Blue John 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 Blue John and Bustamite chemical formula.

Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

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Blue John Vs Chrome-Chalcedony

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Blue John and Bustamite Specific Gravity

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