Montebrasite and Blue John Physical Properties

Montebrasite

Blue John

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.98-3.103.00-3.25

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Not Available

1.6 Cleavage

{100} Perfect, {110} Good, {011} Distinct

Not Available

1.7 Mohs Hardness

5.5-6Not Available

2 10

1.8 Chemical Composition

LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

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

Montebrasite and Blue John Chemical Formula

While comparing Montebrasite and Blue John 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 Montebrasite and Blue John chemical formula.

Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Montebrasite and Blue John Specific Gravity

Another important criteria for qualitative analysis of gemstones is Montebrasite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Montebrasite and Blue John Optical Properties during the identification of gemstone. Specific gravity of Montebrasite is 3.00-3.25 whereas that of Blue John is 3.00-3.25.