Verdelite and Jacobsite Physical Properties
Specific Gravity
2.90-3.40
4.76-5.03
Fracture
Conchoidal
Conchoidal
Cleavage
Indiscernible
None
Mohs Hardness
7-7.5
5.5-6.5
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.
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Verdelite and Jacobsite Chemical Formula
While comparing Verdelite and Jacobsite 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 Verdelite and Jacobsite chemical formula.
- Chemical formula of Verdelite- 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 Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Verdelite and Jacobsite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Verdelite and Jacobsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Verdelite and Jacobsite Optical Properties during the identification of gemstone. Specific gravity of Verdelite is 4.76-5.03 whereas that of Jacobsite is 4.76-5.03.