Pollucite and Lazurite Physical Properties
Solubility
Readily soluble in HF
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.86-2.94
2.75
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
None observed
Imperfect on {110}
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Pollucite and Lazurite Chemical Formula
While comparing Pollucite and Lazurite 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 Lazurite 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 Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Pollucite and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 2.75 whereas that of Lazurite is 2.75.