Hemimorphite and Kyanite Physical Properties

Hemimorphite

Kyanite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.30-3.503.53-3.65

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann, Conchoidal

Splintery

Cleavage

Perfect on {110}, poor on {101}, {001} rare

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

Mohs Hardness

54-7

2 10

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Chemical Composition

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Al2SiO5

Hemimorphite and Kyanite Chemical Formula

While comparing Hemimorphite 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 Hemimorphite and Kyanite chemical formula.

Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Kyanite- Al2SiO5

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Hemimorphite and Kyanite Specific Gravity

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