Pollucite and Gahnite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Readily soluble in HF
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.86-2.94
4.00-4.62
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Uneven
Cleavage
None observed
Indistinct parting on [111]
Mohs Hardness
6.5-7
7.5-8
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pollucite and Gahnite Chemical Formula
While comparing Pollucite and Gahnite 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 Pollucite and Gahnite chemical formula.
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pollucite and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.