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Pargasite
Pargasite

Herderite
Herderite



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Pargasite
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Herderite

Pargasite and Herderite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.04-3.262.90-3.02
Amber
1 7.18
1.5 Fracture
Splintery, Brittle, Uneven
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
{110} perfect
Indistinct on {110}
1.7 Mohs Hardness
5-65-5.5
Amber
2 10
1.8 Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael O’Donoghue , 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 O’Donoghue , 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.