Willemite and Kyanite Physical Properties

Willemite

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.89-4.183.53-3.65

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

Splintery, Brittle, Metallic

1.6 Cleavage

{0001}, {11 2 0} imperfect

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

5.54-7

2 10

1.8 Chemical Composition

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

Not Available

Willemite and Kyanite Chemical Formula

While comparing Willemite and Kyanite 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 Kyanite chemical formula.

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

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Willemite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.