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Dravite and Precious Opal Physical Properties


Precious Opal and Dravite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.03-3.18   
1.98-2.25   

Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle   
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references   

Cleavage
{???} Indistinct   
Not Available   

Mohs Hardness
7-7.5   
5-6.5   

Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)   
SiO 2 · nH 2OGemdat.org , Management Team (2012)   

Optical Properties >>
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Dravite and Precious Opal Chemical Formula

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

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Dravite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Dravite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.

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