Verdelite and Pyrophyllite Physical Properties
Specific Gravity
2.90-3.40
2.65-2.90
Cleavage
Indiscernible
{001} Perfect
Mohs Hardness
7-7.5
-9999
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.
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Verdelite and Pyrophyllite Chemical Formula
While comparing Verdelite and Pyrophyllite 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 Pyrophyllite 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 Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Verdelite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Verdelite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Verdelite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Verdelite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.