Sillimanite and Jet Physical Properties

Sillimanite

Jet

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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

3.20-3.261.19-1.35

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

Not Available

1.7 Mohs Hardness

6-7.52.5-4

2 10

1.8 Chemical Composition

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

Not Available

Sillimanite and Jet Chemical Formula

While comparing Sillimanite and Jet 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 Jet chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Sillimanite and Jet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Jet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Jet Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 1.19-1.35 whereas that of Jet is 1.19-1.35.