Peridot and Corundum Physical Properties

Peridot

Corundum

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.54-1.553.90-4.05

1 7.18

1.5 Fracture

Conchoidal

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

Poor

None – parting in 3 directions

1.7 Mohs Hardness

6.5-79

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

Al 2O 3Arthur Thomas , Gemstones (2009)

Peridot and Corundum Chemical Formula

While comparing Peridot and Corundum 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 Corundum chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

Compare Semi Precious Gemstones

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Peridot and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Peridot and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Corundum Optical Properties during the identification of gemstone. Specific gravity of Peridot is 3.90-4.05 whereas that of Corundum is 3.90-4.05.