Rhodolite and Black Opal Physical Properties

Rhodolite

Black 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

3.841.97-2.22

1 7.18

1.5 Fracture

Conchoidal

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

none, may show indistinct parting

Not Available

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

(Mg,Fe)₃Al₂Si₃O₁₂

SiO 2 + H 2OUlrich Henn and Claudio C.

Rhodolite and Black Opal Chemical Formula

While comparing Rhodolite and Black 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 Black Opal chemical formula.

Chemical formula of Rhodolite- (Mg,Fe)₃Al₂Si₃O₁₂
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Rhodolite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rhodolite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rhodolite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Rhodolite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.