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Scheelite
Scheelite

Sillimanite
Sillimanite



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Scheelite
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Sillimanite

Scheelite and Sillimanite Physical Properties

Physical Properties

Tenacity

Brittle
Tough

Solubility

-
-

Durability

-
-

Specific Gravity

5.9-6.33.20-3.26
1 7.18
👆🏻

Fracture

Conchoidal, Uneven
Splintery

Cleavage

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

Mohs Hardness

4.5-56-7.5
2 10
👆🏻

Chemical Composition

CaWO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Scheelite and Sillimanite Chemical Formula

While comparing Scheelite 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 Scheelite and Sillimanite chemical formula.

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

Scheelite and Sillimanite Specific Gravity

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