Sugilite and Prehnite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.79
2.80-2.95
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
Poor on {0001}
Distinct on [001]
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
Ca2Al2Si3O12(OH)
Sugilite and Prehnite Chemical Formula
While comparing Sugilite and Prehnite 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 Prehnite 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 Prehnite- Ca2Al2Si3O12(OH)
Sugilite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sugilite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.