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Sillimanite
Sillimanite

Fluorite
Fluorite



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Sillimanite
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Fluorite

Sillimanite and Fluorite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
slightly water soluble and in hot hydrochloric acid
-
3.00-3.25
Subconchoidal, Uneven, ConchoidalWalter Schumann
Octahedral, perfect on {111}, parting on {011}
4
CaF2

Sillimanite and Fluorite Chemical Formula

While comparing Sillimanite and Fluorite 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 Fluorite chemical formula.

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Sillimanite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite Vs Fluorite during the identification of gemstone. Specific gravity of Sillimanite is whereas that of Fluorite is .