Blue John and Brookite Physical Properties

Blue John

Brookite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.1 Specific Gravity

3.00-3.253.87-4.14

1 7.18

1.4 Fracture

Not Available

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.5 Cleavage

Not Available

Poor on {120}, in traces on {001}

1.6 Mohs Hardness

Not Available5.5-6

2 10

1.9 Chemical Composition

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

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Blue John and Brookite Chemical Formula

While comparing Blue John and Brookite 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 Brookite chemical formula.

Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Blue John Vs Chrome Tourmaline

Blue John Vs Chrome-Chalcedony

Blue John Vs Ceylonite

Blue John and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Brookite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 3.87-4.14 whereas that of Brookite is 3.87-4.14.