Rubellite and Brookite Physical Properties
Specific Gravity
3.01-3.06
3.87-4.14
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
Indiscernible
Poor on {120}, in traces on {001}
Mohs Hardness
7-7.5
5.5-6
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.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Rubellite and Brookite Chemical Formula
While comparing Rubellite and Brookite 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 Brookite 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 Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Rubellite and Brookite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rubellite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.