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