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Sellaite and Sillimanite Physical Properties


Sillimanite and Sellaite Physical Properties


Physical Properties

Tenacity
Brittle   
Tough   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.14-3.16   
3.20-3.26   

Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle   
Splintery   

Cleavage
Perfect on {010} and {110}   
{010} perfect   

Mohs Hardness
5-5.5   
6-7.5   

Chemical Composition
MgF 2Ulrich Henn and Claudio C.   
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Sellaite and Sillimanite Chemical Formula

While comparing Sellaite 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 Sellaite and Sillimanite chemical formula.

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Sellaite and Sillimanite Specific Gravity

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

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