Peridot and Forsterite Physical Properties

Peridot

Forsterite

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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

1.54-1.553.23-3.26

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

Poor

Perfect on {010} imperfect on {100}

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

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

Peridot and Forsterite Chemical Formula

While comparing Peridot and Forsterite 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 Peridot and Forsterite chemical formula.

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

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Peridot and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Peridot and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Peridot is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.