Verdelite and Ludlamite Physical Properties
Specific Gravity
2.90-3.40
3.1-3.2
Cleavage
Indiscernible
Vitreous, pearly on cleavage
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.
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Verdelite and Ludlamite Chemical Formula
While comparing Verdelite and Ludlamite 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 Ludlamite 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 Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Verdelite and Ludlamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Verdelite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Verdelite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Verdelite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.