Erythrite and Rubellite Physical Properties
Tenacity
Sectile
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.06
3.01-3.06
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Not Available
Mohs Hardness
Not Available
7-7.5
Chemical Composition
Co3(AsO4)2•8(H2O)
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.
Erythrite and Rubellite Chemical Formula
While comparing Erythrite 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 Erythrite and Rubellite chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- 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.
Erythrite and Rubellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.