×

Blue John
Blue John

Dravite
Dravite



ADD
Compare
X
Blue John
X
Dravite

Blue John and Dravite Physical Properties

Add ⊕
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
-
-
-
3.03-3.18
Uneven, Irregular, Conchoidal
{???} Indistinct
7-7.5
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Blue John and Dravite Chemical Formula

While comparing Blue John and Dravite 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 Dravite chemical formula.

    >>

Blue John and Dravite Specific Gravity

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