Labradorite and Riebeckite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.69-2.72
  
3.28-3.44
  
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
  
Uneven, Splintery, Brittle
  
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
  
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
  
Mohs Hardness
6-6.5
  
5.0-6.0
  
Chemical Composition
(Na,Ca)1-2Si3-2O8
  
Not Available
  
Labradorite and Riebeckite Chemical Formula
While comparing Labradorite and Riebeckite 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 Riebeckite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
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Labradorite and Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.