Dravite and Wulfenite Physical Properties

Dravite

Wulfenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.03-3.186.50-7.00

1 7.18

1.5 Fracture

Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Irregular, Brittle, Conchoidal

1.6 Cleavage

{???} Indistinct

On {011}, distinct; on {001}, {013}, indistinct

1.7 Mohs Hardness

7-7.53

2 10

1.8 Chemical Composition

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

PbMoO 4Walter Schumann , Gemstones of the world (2001)

Dravite and Wulfenite Chemical Formula

While comparing Dravite and Wulfenite 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 Wulfenite chemical formula.

Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)

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Dravite and Wulfenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Wulfenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Wulfenite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 6.50-7.00 whereas that of Wulfenite is 6.50-7.00.