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Gypsum
Gypsum

Black Opal
Black Opal



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Gypsum
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Black Opal

Gypsum and Black Opal Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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)
 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.

Gypsum and Black Opal Chemical Formula

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

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Gypsum and Black Opal Specific Gravity

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