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Common Opal
Common Opal

Austinite
Austinite



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Common Opal
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Austinite

Common Opal and Austinite 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)
 
Brittle
Easily soluble in cold dilute HCl
-
4.12
Uneven
Good in two directions parallel to the prism faces {110}
4-4.5
CaZn(AsO4)(OH)

Common Opal and Austinite Chemical Formula

While comparing Common Opal and Austinite 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 Austinite chemical formula.

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Common Opal and Austinite Specific Gravity

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