Peridot and Periclase Physical Properties

Peridot

Periclase

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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

1.54-1.553.7-3.9

1 7.18

1.5 Fracture

Conchoidal

Conchoidal, Brittle

1.6 Cleavage

Poor

{001} perfect; {111} imperfect, may exhibit parting on , {011}

1.7 Mohs Hardness

6.5-75.5-6

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Peridot and Periclase Chemical Formula

While comparing Peridot and Periclase 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 Periclase chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

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Peridot and Periclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Peridot and Periclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Periclase Optical Properties during the identification of gemstone. Specific gravity of Peridot is 3.7-3.9 whereas that of Periclase is 3.7-3.9.