Omphacite and Opal Physical Properties

Omphacite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.43

1.98-2.25

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

{110} Good, {110} Good

None

1.7 Mohs Hardness

5-6

5-6.5

1.8 Chemical Composition

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

SiO₂ · nH₂O

Omphacite and Opal Chemical Formula

While comparing Omphacite and 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 Opal chemical formula.

Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Opal- SiO₂ · nH₂O

Compare Green Gemstones

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Omphacite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Omphacite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Omphacite and Opal Optical Properties during the identification of gemstone. Specific gravity of Omphacite is 1.98-2.25 whereas that of Opal is 1.98-2.25.