Muscovite and Sillimanite Physical Properties

Muscovite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Elastic

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.883.20-3.26

1 7.18

1.5 Fracture

Micaceous, Brittle

Splintery

1.6 Cleavage

Perfect on the {001}

{010} perfect

1.7 Mohs Hardness

2-36-7.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Muscovite and Sillimanite Chemical Formula

While comparing Muscovite and Sillimanite 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 Sillimanite 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 Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Muscovite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Muscovite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Muscovite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Muscovite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.