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