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Sillimanite
Sillimanite

Hibonite
Hibonite



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Sillimanite
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Hibonite

Sillimanite and Hibonite 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)
 
-
-
-
3.84
Subconchoidal, Conchoidal
{0001} good, {10 1 0} parting
7.5-8
(Ca,Ce)(Al,Ti,Mg)12O19

Sillimanite and Hibonite Chemical Formula

While comparing Sillimanite and Hibonite 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 Hibonite chemical formula.

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Sillimanite and Hibonite Specific Gravity

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