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Selenite
Selenite

Dravite
Dravite



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Selenite
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Dravite

Selenite and Dravite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
Perfect
2
CaSO4·2H2O
 
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-
-
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)

Selenite and Dravite Chemical Formula

While comparing Selenite 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 Selenite and Dravite chemical formula.

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Selenite and Dravite Specific Gravity

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