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Legrandite
Legrandite

Blue John
Blue John



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Legrandite
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Blue John

Legrandite and Blue John Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.98-4.04
Conchoidal
Imperfect, poor one {100}
4.5-5
Zn 2(AsO 4)(OH) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Legrandite and Blue John Chemical Formula

While comparing Legrandite 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 Legrandite and Blue John chemical formula.

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Legrandite and Blue John Specific Gravity

Another important criteria for qualitative analysis of gemstones is Legrandite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite Vs Blue John during the identification of gemstone. Specific gravity of Legrandite is whereas that of Blue John is .