Celestine and Sillimanite Physical Properties

Celestine

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

3.90-4.003.20-3.26

1 7.18

1.5 Fracture

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Splintery

1.6 Cleavage

Perfect on {001}, good on {210}, poor on {010}

{010} perfect

1.7 Mohs Hardness

3-3.56-7.5

2 10

1.8 Chemical Composition

SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Celestine and Sillimanite Chemical Formula

While comparing Celestine 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 Celestine and Sillimanite chemical formula.

Chemical formula of Celestine- SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Celestine and Sillimanite Specific Gravity

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