Erythrite and Lazurite Physical Properties
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.06
2.75
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Imperfect on {110}
Mohs Hardness
Not Available
5.5
Chemical Composition
Co3(AsO4)2•8(H2O)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Erythrite and Lazurite Chemical Formula
While comparing Erythrite 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 Erythrite and Lazurite chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Erythrite and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.75 whereas that of Lazurite is 2.75.