Sugilite and Apatite Physical Properties
Specific Gravity
2.69-2.79
3.16-3.23
Fracture
Conchoidal
Conchoidal, Uneven, Conchoidal to uneven
Cleavage
Poor on {0001}
[0001] indistinct, [1010] indistinct
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Apatite Chemical Formula
While comparing Sugilite and Apatite 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 Apatite 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 Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Sugilite and Apatite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sugilite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.