Petalite and Riesling Beryl Physical Properties

Petalite

Riesling Beryl

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.402.66-2.86

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

6-6.57.5-8

2 10

1.8 Chemical Composition

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

Al 2Be 3Si 6O 18Martin H.

Petalite and Riesling Beryl Chemical Formula

While comparing Petalite and Riesling Beryl 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 Riesling Beryl chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Riesling Beryl- Al 2Be 3Si 6O 18Martin H.

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Petalite and Riesling Beryl Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Riesling Beryl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Riesling Beryl Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.66-2.86 whereas that of Riesling Beryl is 2.66-2.86.