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Cryolite
Cryolite

Sillimanite
Sillimanite



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Cryolite
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Sillimanite

Cryolite and Sillimanite Physical Properties

Physical Properties

Tenacity

Brittle
Tough

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.973.20-3.26
1 7.18
👆🏻

Fracture

Uneven
Splintery

Cleavage

None observed
{010} perfect

Mohs Hardness

2.56-7.5
2 10
👆🏻

Chemical Composition

Na 3AlF 6Ulrich Henn and Claudio C.
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Cryolite and Sillimanite Chemical Formula

While comparing Cryolite 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 Cryolite and Sillimanite chemical formula.

  • Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.
  • Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Cryolite and Sillimanite Specific Gravity

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