Omphacite and Common Opal Physical Properties

Omphacite

Common Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.431.98-2.50

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

{110} Good, {110} Good

Not Available

1.7 Mohs Hardness

5-65.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Omphacite and Common Opal Chemical Formula

While comparing Omphacite and Common Opal 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 Omphacite and Common Opal chemical formula.

Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Compare Green Gemstones

Omphacite Vs Prase Opal

Omphacite Vs Pleonaste

Omphacite Vs Powellite

Omphacite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Omphacite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Omphacite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Omphacite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.