Sugilite and Pollucite Physical Properties
Solubility
-
Readily soluble in HF
Specific Gravity
2.69-2.79
2.86-2.94
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
Poor on {0001}
None observed
Mohs Hardness
5.5-6.5
6.5-7
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Pollucite Chemical Formula
While comparing Sugilite and Pollucite 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 Sugilite and Pollucite chemical formula.
- Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Pollucite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sugilite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.