Blue John and Oligoclase Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
2.62-2.67
Fracture
Not Available
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
Not Available
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
Not Available
6-6.5
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Oligoclase Chemical Formula
While comparing Blue John and Oligoclase 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 Oligoclase chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Blue John is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.