Sillimanite and Scheelite Physical Properties

Sillimanite

Scheelite

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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

3.20-3.265.9-6.3

1 7.18

1.5 Fracture

Splintery

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Uneven

1.6 Cleavage

{010} perfect

On {101}, distinct; on {112}, interrupted; on {001}, indistinct

1.7 Mohs Hardness

6-7.54.5-5

2 10

1.8 Chemical Composition

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

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

Sillimanite and Scheelite Chemical Formula

While comparing Sillimanite and Scheelite 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 Scheelite chemical formula.

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

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Sillimanite and Scheelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Scheelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Scheelite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 5.9-6.3 whereas that of Scheelite is 5.9-6.3.