Dravite and Villiaumite Physical Properties

Dravite

Villiaumite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.03-3.182.79

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

{???} Indistinct

{100} Perfect, {010} Perfect, {001} Perfect

1.7 Mohs Hardness

7-7.52

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)

NaFUlrich Henn and Claudio C.

Dravite and Villiaumite Chemical Formula

While comparing Dravite and Villiaumite 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 Villiaumite 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 Villiaumite- NaFUlrich Henn and Claudio C.

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Dravite and Villiaumite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Villiaumite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Villiaumite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.79 whereas that of Villiaumite is 2.79.