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Black Opal
Black Opal

Sugilite
Sugilite



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Black Opal
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Sugilite

Black Opal and Sugilite 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.
 
-
-
-
2.69-2.79
Conchoidal
Poor on {0001}
5.5-6.5
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Black Opal and Sugilite Chemical Formula

While comparing Black Opal and Sugilite 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 Sugilite chemical formula.

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Black Opal and Sugilite Specific Gravity

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