Pezzottaite and Sillimanite Physical Properties

Pezzottaite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.143.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Imperfect; basal

{010} perfect

1.7 Mohs Hardness

7.5-86-7.5

2 10

1.8 Chemical Composition

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

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

Pezzottaite and Sillimanite Chemical Formula

While comparing Pezzottaite 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 Pezzottaite and Sillimanite chemical formula.

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

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Pezzottaite and Sillimanite Specific Gravity

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