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Common Opal
Common Opal

Gypsum
Gypsum



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Common Opal
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Gypsum

Common Opal and Gypsum Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
 
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)

Common Opal and Gypsum Chemical Formula

While comparing Common 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 Common Opal and Gypsum chemical formula.

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Common Opal and Gypsum Specific Gravity

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