Goethite and Lazurite Physical Properties
Tenacity
Not Available
Brittle
Solubility
HCl soluble
Soluble
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
2.75
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect {010}
Imperfect on {110}
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Goethite and Lazurite Chemical Formula
While comparing Goethite 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 Goethite and Lazurite chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Goethite and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.75 whereas that of Lazurite is 2.75.