Petalite and Cymophane Physical Properties

Petalite

Cymophane

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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

2.403.69-3.81

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

6-6.58.5

2 10

1.8 Chemical Composition

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

BeAl 2O 4Arthur Thomas , Gemstones (2009)

Petalite and Cymophane Chemical Formula

While comparing Petalite and Cymophane 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 Cymophane chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cymophane- BeAl 2O 4Arthur Thomas , Gemstones (2009)

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Petalite and Cymophane Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Cymophane Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Cymophane Optical Properties during the identification of gemstone. Specific gravity of Petalite is 3.69-3.81 whereas that of Cymophane is 3.69-3.81.