Albite and Sillimanite Physical Properties

Albite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.60-2.653.20-3.26

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal

Splintery

1.6 Cleavage

Perfect on {001}, very good on {010}, imperfect on {110}

{010} perfect

1.7 Mohs Hardness

6-6.56-7.5

2 10

1.8 Chemical Composition

NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Albite and Sillimanite Chemical Formula

While comparing Albite 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 Albite and Sillimanite chemical formula.

Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Albite and Sillimanite Specific Gravity

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