Rubellite and Chromite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.01-3.06
4.5-4.8
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven
Cleavage
Not Available
None, parting may develop along {111}
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Fe++Cr2O4
Rubellite and Chromite Chemical Formula
While comparing Rubellite and Chromite 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 Rubellite and Chromite chemical formula.
- Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
- Chemical formula of Chromite- Fe++Cr2O4
Rubellite and Chromite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rubellite and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Chromite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 4.5-4.8 whereas that of Chromite is 4.5-4.8.