Hercynite and Pargasite Physical Properties

Hercynite

Pargasite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.04-3.26

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Splintery, Brittle, Uneven

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

{110} perfect

1.7 Mohs Hardness

7.5-85-6

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Hercynite and Pargasite Chemical Formula

While comparing Hercynite and Pargasite 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 Hercynite and Pargasite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Hercynite and Pargasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Pargasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Pargasite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.04-3.26 whereas that of Pargasite is 3.04-3.26.