Williamsite and Dravite Physical Properties

Williamsite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.51-2.63

Conchoidal

Perfect

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony 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)

Williamsite and Dravite Chemical Formula

While comparing Williamsite 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 Williamsite and Dravite chemical formula.

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Williamsite and Dravite Specific Gravity

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