Riebeckite and Fibrolite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.28-3.44
  
3.14-3.25
  
Fracture
Uneven, Splintery, Brittle
  
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
  
Not Available
  
Mohs Hardness
5.0-6.0
  
6-7
  
Chemical Composition
Not Available
  
Al 2SiO 5Arthur Thomas , Gemstones (2009)
  
Riebeckite and Fibrolite Chemical Formula
While comparing Riebeckite and Fibrolite 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 Riebeckite and Fibrolite chemical formula.
>- Chemical formula of Fibrolite- Al 2SiO 5Arthur Thomas , Gemstones (2009)
Riebeckite and Fibrolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Riebeckite and Fibrolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Fibrolite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 3.14-3.25 whereas that of Fibrolite is 3.14-3.25.