Smithsonite and Sillimanite Physical Properties

Smithsonite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.653.20-3.26

1 7.18

1.5 Fracture

Uneven, Sub-Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

Splintery

1.6 Cleavage

Perfect on [1011]

{010} perfect

1.7 Mohs Hardness

5-5.56-7.5

2 10

1.8 Chemical Composition

ZnCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Smithsonite and Sillimanite Chemical Formula

While comparing Smithsonite 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 Smithsonite and Sillimanite chemical formula.

Chemical formula of Smithsonite- ZnCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

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Smithsonite and Sillimanite Specific Gravity

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