Petalite and Muscovite Physical Properties

Petalite

Muscovite

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1 Physical Properties

1.1 Tenacity

Brittle

Elastic

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.402.78-2.88

1 7.18

1.5 Fracture

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

Micaceous, Brittle

1.6 Cleavage

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

Perfect on the {001}

1.7 Mohs Hardness

6-6.52-3

2 10

1.8 Chemical Composition

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

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

Petalite and Muscovite Chemical Formula

While comparing Petalite and Muscovite 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 Muscovite chemical formula.

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

Compare Gems Found In Australia

Petalite Vs Scheelite

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Petalite Vs Sapphire

Petalite and Muscovite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Muscovite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Muscovite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.78-2.88 whereas that of Muscovite is 2.78-2.88.