Jacobsite and Rubellite Physical Properties
Specific Gravity
4.76-5.03
3.01-3.06
Fracture
Conchoidal
Conchoidal
Cleavage
None
Indiscernible
Mohs Hardness
5.5-6.5
7-7.5
Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
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.
Jacobsite and Rubellite Chemical Formula
While comparing Jacobsite 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 Jacobsite and Rubellite chemical formula.
- Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
- 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.
Jacobsite and Rubellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Jacobsite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Jacobsite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Jacobsite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.