Fayalite and Pargasite Physical Properties

Fayalite

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

4.3923.04-3.26

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Splintery, Brittle, Uneven

1.6 Cleavage

{010} moderate, {100} imperfect

{110} perfect

1.7 Mohs Hardness

6.5-75-6

2 10

1.8 Chemical Composition

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Fayalite and Pargasite Chemical Formula

While comparing Fayalite 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 Fayalite and Pargasite chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Fayalite and Pargasite Specific Gravity

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