Sillimanite and Pezzottaite Physical Properties

Sillimanite

Pezzottaite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.262.90-3.14

1 7.18

1.5 Fracture

Splintery

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{010} perfect

Imperfect; basal

1.7 Mohs Hardness

6-7.57.5-8

2 10

1.8 Chemical Composition

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

(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.

Sillimanite and Pezzottaite Chemical Formula

While comparing Sillimanite and Pezzottaite 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 Sillimanite and Pezzottaite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.

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Sillimanite and Pezzottaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Pezzottaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Pezzottaite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.90-3.14 whereas that of Pezzottaite is 2.90-3.14.