Sugilite and Nephrite Physical Properties
Specific Gravity
2.69-2.79
2.90-3.10
Fracture
Conchoidal
Splintery, Granular
Cleavage
Poor on {0001}
None
Mohs Hardness
5.5-6.5
6-6.5
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Nephrite Chemical Formula
While comparing Sugilite and Nephrite 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 Sugilite and Nephrite chemical formula.
- Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Nephrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sugilite and Nephrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Nephrite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 2.90-3.10 whereas that of Nephrite is 2.90-3.10.