Alunite and Sugilite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.6-2.9
2.69-2.79
Fracture
Conchoidal, Uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
On {0001}, perfect
Poor on {0001}
Mohs Hardness
3.5-4
5.5-6.5
Chemical Composition
KAl3(SO4)2(OH)6
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Sugilite Chemical Formula
While comparing Alunite and Sugilite 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 Alunite and Sugilite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Sugilite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Sugilite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Sugilite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.69-2.79 whereas that of Sugilite is 2.69-2.79.