Caledonite and Common Opal Physical Properties

Caledonite

Common Opal

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

5.6-5.76

Uneven

[001] perfect; [100] distinct

2.5-3

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

1.98-2.50

Conchoidal

None

5.5-6.5

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

Caledonite and Common Opal Chemical Formula

While comparing Caledonite 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 Caledonite and Common Opal chemical formula.

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Caledonite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Caledonite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Caledonite Vs Common Opal during the identification of gemstone. Specific gravity of Caledonite is whereas that of Common Opal is .