Sillimanite and Celestine Physical Properties

Sillimanite

Celestine

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.263.90-4.00

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

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

1.7 Mohs Hardness

6-7.53-3.5

2 10

1.8 Chemical Composition

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

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

Sillimanite and Celestine Chemical Formula

While comparing Sillimanite and Celestine 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 Celestine chemical formula.

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

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Sillimanite and Celestine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Celestine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Celestine Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.90-4.00 whereas that of Celestine is 3.90-4.00.