Petalite and Covellite Physical Properties

Petalite

Covellite

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1 Physical Properties

1.1 Tenacity

Brittle

Flexible

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.404.6-4.76

1 7.18

1.5 Fracture

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

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

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

Perfect on {0001}

1.7 Mohs Hardness

6-6.5Not Available

2 10

1.8 Chemical Composition

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

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Petalite and Covellite Chemical Formula

While comparing Petalite and Covellite 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 Covellite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Gems Found In Australia

Petalite Vs Scolecite

Petalite Vs Sapphire

Petalite Vs Scheelite

Petalite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.