Labradorite and Blue John Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
3.00-3.25
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Not Available
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Not Available
Mohs Hardness
6-6.5
Not Available
Chemical Composition
(Na,Ca)1-2Si3-2O8
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Labradorite and Blue John Chemical Formula
While comparing Labradorite 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 Labradorite and Blue John chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Labradorite and Blue John Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Blue John Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.00-3.25 whereas that of Blue John is 3.00-3.25.