Peridot and Poudretteite Physical Properties

Peridot

Poudretteite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.54-1.552.51-2.53

1 7.18

1.5 Fracture

Conchoidal

Conchoidal, Splintery

1.6 Cleavage

Poor

None

1.7 Mohs Hardness

6.5-75

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Peridot and Poudretteite Chemical Formula

While comparing Peridot and Poudretteite 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 Poudretteite chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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Peridot and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Peridot and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Peridot is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.