Dravite and Willemite Physical Properties

Dravite

Willemite

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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

3.03-3.183.89-4.18

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

{???} Indistinct

{0001}, {11 2 0} imperfect

1.7 Mohs Hardness

7-7.55.5

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)

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Dravite and Willemite Chemical Formula

While comparing Dravite and Willemite 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 Willemite 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 Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dravite and Willemite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Willemite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Willemite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.89-4.18 whereas that of Willemite is 3.89-4.18.