Kyanite and Rubellite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.53-3.65
3.01-3.06
Fracture
Splintery, Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
[100] perfect [010] imperfect with 79° angle between
Not Available
Chemical Composition
Not Available
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.
Kyanite and Rubellite Chemical Formula
While comparing Kyanite and Rubellite 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 Kyanite and Rubellite 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.
Kyanite and Rubellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.