Schorl and Pollucite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Readily soluble in HF
Durability
Not Available
Not Available
Specific Gravity
3.18-3.22
2.86-2.94
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
{1011} Indistinct
None observed
Mohs Hardness
Not Available
6.5-7
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Schorl and Pollucite Chemical Formula
While comparing Schorl 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 Schorl and Pollucite chemical formula.
- Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Schorl and Pollucite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Schorl and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Schorl is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.