Muscovite and Petalite Physical Properties

Muscovite

Petalite

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1 Physical Properties

1.1 Tenacity

Elastic

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.882.40

1 7.18

1.5 Fracture

Micaceous, Brittle

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

1.6 Cleavage

Perfect on the {001}

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

1.7 Mohs Hardness

2-36-6.5

2 10

1.8 Chemical Composition

KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references

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

Muscovite and Petalite Chemical Formula

While comparing Muscovite 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 Muscovite and Petalite chemical formula.

Chemical formula of Muscovite- KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Colorless Gems

Muscovite Vs Petalite

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Muscovite Vs Pezzottaite

Muscovite and Petalite Specific Gravity

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