Prasiolite and Petalite Physical Properties

Prasiolite

Petalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.40

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

3,1

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

1.7 Mohs Hardness

76-6.5

2 10

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Prasiolite and Petalite Chemical Formula

While comparing Prasiolite and Petalite 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 Prasiolite and Petalite chemical formula.

Chemical formula of Prasiolite- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Prasiolite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Prasiolite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prasiolite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Prasiolite is 2.40 whereas that of Petalite is 2.40.