Rubellite and Albite Physical Properties
Specific Gravity
3.01-3.06
2.60-2.65
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Indiscernible
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
7-7.5
6-6.5
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.
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Rubellite and Albite Chemical Formula
While comparing Rubellite and Albite 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 Albite 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 Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Rubellite and Albite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rubellite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Albite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 2.60-2.65 whereas that of Albite is 2.60-2.65.