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Precious Opal
Precious Opal

Dravite
Dravite



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Precious Opal
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Dravite

Precious Opal and Dravite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.25
Conchoidal
None
5-6.5
SiO 2 · nH 2OGemdat.org , Management Team (2012)
 
-
-
-
3.03-3.18
Uneven, Irregular, Conchoidal
{???} Indistinct
7-7.5
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Precious Opal and Dravite Chemical Formula

While comparing Precious Opal and Dravite 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 Precious Opal and Dravite chemical formula.

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Precious Opal and Dravite Specific Gravity

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