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Opal
Opal

Cassiterite
Cassiterite



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Opal
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Opal and Cassiterite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
Brittle
insoluble
-
6.86-7.03
Subconchoidal, Uneven, Conchoidal, Irregular
{100} imperfect, {110} indistinct; partings on {111} or {011}
6-7
SnO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Opal and Cassiterite Chemical Formula

While comparing Opal and Cassiterite 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 Opal and Cassiterite chemical formula.

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Opal and Cassiterite Specific Gravity

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