Willemite and Spinel Physical Properties

Willemite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.89-4.183.64-3.66

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{0001}, {11 2 0} imperfect

None, but may exhibit slight parting

1.7 Mohs Hardness

5.58

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Willemite and Spinel Chemical Formula

While comparing Willemite and Spinel 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 Spinel chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

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Willemite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Willemite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.