Willemite and Cassiterite Physical Properties

Willemite

Cassiterite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble

Durability

Specific Gravity

3.89-4.186.86-7.03

1 7.18

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Fracture

Conchoidal, Uneven

Subconchoidal, Uneven, Conchoidal, Irregular

Cleavage

{0001}, {11 2 0} imperfect

{100} imperfect, {110} indistinct; partings on {111} or {011}

Mohs Hardness

5.56-7

2 10

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Chemical Composition

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

SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Willemite and Cassiterite Chemical Formula

While comparing Willemite and Cassiterite 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 Willemite and Cassiterite chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cassiterite- SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Willemite and Cassiterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Cassiterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Cassiterite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 6.86-7.03 whereas that of Cassiterite is 6.86-7.03.