Cordierite and Pollucite Physical Properties
Solubility
Not Available
Readily soluble in HF
Durability
Not Available
Not Available
Specific Gravity
2.57-2.66
2.86-2.94
Fracture
Subconchoidal, Conchoidal, Brittle
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Fair on {100}, poor on {001} and {010}
None observed
Mohs Hardness
7-7.5
6.5-7
Chemical Composition
Mg2Al4Si5O18
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Cordierite and Pollucite Chemical Formula
While comparing Cordierite 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 Cordierite and Pollucite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Cordierite and Pollucite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.