Pargasite and Herderite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.04-3.26
2.90-3.02
Fracture
Splintery, Brittle, Uneven
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
{110} perfect
Indistinct on {110}
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Pargasite and Herderite Chemical Formula
While comparing Pargasite and Herderite 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 Herderite chemical formula.
- Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Pargasite and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pargasite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pargasite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Pargasite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.