Diaspore and Blue John Physical Properties
Tenacity
Very brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.30-3.40
3.00-3.25
Fracture
Conchoidal, Brittle, Conchoidal
Not Available
Cleavage
{010} perfect, {110} distinct, {100} in traces
Not Available
Mohs Hardness
6.5-7
Not Available
Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Diaspore and Blue John Chemical Formula
While comparing Diaspore 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 Diaspore and Blue John chemical formula.
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Diaspore and Blue John Specific Gravity
Another important criteria for qualitative analysis of gemstones is Diaspore and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diaspore and Blue John Optical Properties during the identification of gemstone. Specific gravity of Diaspore is 3.00-3.25 whereas that of Blue John is 3.00-3.25.