Achroite and Pollucite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Readily soluble in HF
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-3.40
  
2.86-2.94
  
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
Not Available
  
None observed
  
Mohs Hardness
7-7.5
  
6.5-7
  
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
  
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
  
Achroite and Pollucite Chemical Formula
While comparing Achroite 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 Achroite and Pollucite chemical formula.
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Achroite and Pollucite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.