Kyanite and Willemite Physical Properties

Kyanite

Willemite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.653.89-4.18

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

1.6 Cleavage

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

{0001}, {11 2 0} imperfect

1.7 Mohs Hardness

4-75.5

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Willemite Chemical Formula

While comparing Kyanite 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 Kyanite and Willemite chemical formula.

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

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Kyanite and Willemite Specific Gravity

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