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