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Black Opal
Black Opal

Rutile
Rutile



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Black Opal
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Rutile

Black Opal and Rutile Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.
 
-
Insoluble in acids
-
4.20-4.30
Uneven, Conchoidal
{110} good, 100 moderate, parting on {092} and {011}
6-6.5
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Black Opal and Rutile Chemical Formula

While comparing Black Opal and Rutile 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 Black Opal and Rutile chemical formula.

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Black Opal and Rutile Specific Gravity

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