Pargasite and Prehnite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.04-3.26
2.80-2.95
Fracture
Splintery, Brittle, Uneven
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
{110} perfect
Distinct on [001]
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca2Al2Si3O12(OH)
Pargasite and Prehnite Chemical Formula
While comparing Pargasite 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 Pargasite and Prehnite chemical formula.
- Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
Pargasite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pargasite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pargasite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Pargasite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.