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Black Opal
Black Opal

Brucite
Brucite



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Black Opal
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Brucite

Black Opal and Brucite 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.
 
Sectile
-
-
2.39
Irregular
Perfect on {0001}
2.5
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Black Opal and Brucite Chemical Formula

While comparing Black Opal and Brucite 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 Brucite chemical formula.

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Black Opal and Brucite Specific Gravity

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