Petalite and Smithsonite Physical Properties

Petalite

Smithsonite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble

Durability

Specific Gravity

2.404.00-4.65

1 7.18

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Fracture

Subconchoidal, ConchoidalWalter Schumann, Conchoidal

Uneven, Sub-Conchoidal

Cleavage

Perfect on {001}, poor on {201} with 38.5° angle between the two

Perfect on [1011]

Mohs Hardness

6-6.55-5.5

2 10

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Chemical Composition

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Petalite and Smithsonite Chemical Formula

While comparing Petalite 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 Petalite and Smithsonite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Smithsonite- ZnCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Petalite and Smithsonite Specific Gravity

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