Hemimorphite and Sillimanite Physical Properties

Hemimorphite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.503.20-3.26

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Splintery

1.6 Cleavage

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

{010} perfect

1.7 Mohs Hardness

56-7.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Hemimorphite and Sillimanite Chemical Formula

While comparing Hemimorphite and Sillimanite 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 Sillimanite 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 Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Hemimorphite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hemimorphite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hemimorphite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Hemimorphite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.