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Black Opal
Black Opal
☒

Anorthoclase
Anorthoclase
☒



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Black Opal
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Anorthoclase

Black Opal and Anorthoclase Physical Properties

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.
 
-
-
-
2.56-2.62
Uneven
From the Greek for oblique and fracture, descriptive of the cleavage
6-6.5
(Na,K)AlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Black Opal and Anorthoclase Chemical Formula

While comparing Black Opal and Anorthoclase 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 Anorthoclase chemical formula.

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Black Opal and Anorthoclase Specific Gravity

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