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Black Opal
Black Opal

Gypsum
Gypsum



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Black Opal
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Gypsum

Black Opal and Gypsum 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.
 
Flexible
Soluble
-
2.20-2.40
Conchoidal, Splintery, Fibrous
Perfect on {010}, distinct on {100}
2
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Black Opal and Gypsum Chemical Formula

While comparing Black Opal and Gypsum 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 Gypsum chemical formula.

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Black Opal and Gypsum Specific Gravity

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