Corundum and Peridot Physical Properties

Corundum

Peridot

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.051.54-1.55

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Conchoidal

1.6 Cleavage

None – parting in 3 directions

Poor

1.7 Mohs Hardness

96.5-7

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

(Mg,Fe)₂SiO₄

Corundum and Peridot Chemical Formula

While comparing Corundum 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 Corundum and Peridot chemical formula.

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

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Corundum and Peridot Specific Gravity

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