Fayalite and Peridot Physical Properties

Fayalite

Peridot

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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

4.3921.54-1.55

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

{010} moderate, {100} imperfect

Poor

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

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

(Mg,Fe)₂SiO₄

Fayalite and Peridot Chemical Formula

While comparing Fayalite and Peridot 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 Peridot chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Peridot- (Mg,Fe)₂SiO₄

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Fayalite and Peridot Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Peridot Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Peridot Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 1.54-1.55 whereas that of Peridot is 1.54-1.55.