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Kyanite
Kyanite

Willemite
Willemite



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Kyanite
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Willemite

Kyanite and Willemite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.53-3.653.89-4.18
Amber
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
Amber
2 10
1.8 Chemical Composition
Not Available
Zn 2SiO 4Michael O’Donoghue , 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.

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

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.