Petalite and Simpsonite Physical Properties

Petalite

Simpsonite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

insoluble

2.40

Subconchoidal, ConchoidalWalter Schumann, Conchoidal

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

6-6.5

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

-9999

Conchoidal

None

7-7.5

Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.

Petalite and Simpsonite Chemical Formula

While comparing Petalite and Simpsonite 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 Simpsonite chemical formula.

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Petalite and Simpsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Simpsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite Vs Simpsonite during the identification of gemstone. Specific gravity of Petalite is whereas that of Simpsonite is .