Rhodolite and Common Opal Physical Properties

Rhodolite

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

3.841.98-2.50

1 7.18

1.5 Fracture

Conchoidal

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

none, may show indistinct parting

Not Available

1.7 Mohs Hardness

7-7.55.5-6.5

2 10

1.8 Chemical Composition

(Mg,Fe)₃Al₂Si₃O₁₂

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

Rhodolite and Common Opal Chemical Formula

While comparing Rhodolite 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 Rhodolite and Common Opal chemical formula.

Chemical formula of Rhodolite- (Mg,Fe)₃Al₂Si₃O₁₂
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Rhodolite and Common Opal Specific Gravity

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