Phlogopite and Omphacite Physical Properties

Phlogopite

Omphacite

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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

2.78-2.853.16-3.43

1 7.18

1.5 Fracture

None, Uneven

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

Perfect basal (001)

{110} Good, {110} Good

1.7 Mohs Hardness

2-2.55-6

2 10

1.8 Chemical Composition

Not Available

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Phlogopite and Omphacite Chemical Formula

While comparing Phlogopite and Omphacite 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 Omphacite chemical formula.

Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

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Phlogopite and Omphacite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.