Norbergite and Dravite Physical Properties

Norbergite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.177

Uneven, Conchoidal

{???} Distinct

6-6.5

Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

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)

Norbergite and Dravite Chemical Formula

While comparing Norbergite 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 Norbergite and Dravite chemical formula.

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Norbergite and Dravite Specific Gravity

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