Sapphire and Willemite Physical Properties

Sapphire

Willemite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.033.89-4.18

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

None, but may exhibit parting

{0001}, {11 2 0} imperfect

1.7 Mohs Hardness

95.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Sapphire and Willemite Chemical Formula

While comparing Sapphire 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 Sapphire and Willemite chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Sapphire and Willemite Specific Gravity

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