Phlogopite and Peridot Physical Properties

Phlogopite

Peridot

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.85

1.54-1.55

1.5 Fracture

None, Uneven

Conchoidal

1.6 Cleavage

Perfect basal (001)

Poor

1.7 Mohs Hardness

2-2.5

6.5-7

1.8 Chemical Composition

Not Available

(Mg,Fe)₂SiO₄

Phlogopite and Peridot Chemical Formula

While comparing Phlogopite 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 Phlogopite and Peridot chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄

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Phlogopite and Peridot Specific Gravity

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