Lazurite and Purpurite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.75
3.2-3.4
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Imperfect on {110}
[100] [001] perfect
Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Lazurite and Purpurite Chemical Formula
While comparing Lazurite and Purpurite 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 Lazurite and Purpurite chemical formula.
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Lazurite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lazurite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.