Sillimanite and Smithsonite Physical Properties

Sillimanite

Smithsonite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.264.00-4.65

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

Perfect on [1011]

1.7 Mohs Hardness

6-7.55-5.5

2 10

1.8 Chemical Composition

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

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

Sillimanite and Smithsonite Chemical Formula

While comparing Sillimanite and Smithsonite 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 Sillimanite and Smithsonite chemical formula.

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

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Sillimanite and Smithsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Smithsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Smithsonite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 4.00-4.65 whereas that of Smithsonite is 4.00-4.65.