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Legrandite and Sillimanite Physical Properties


Sillimanite and Legrandite Physical Properties


Physical Properties

Tenacity
Brittle   
Tough   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.98-4.04   
3.20-3.26   

Fracture
Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle   
Splintery   

Cleavage
Imperfect, poor one {100}   
{010} perfect   

Mohs Hardness
4.5-5   
6-7.5   

Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Legrandite and Sillimanite Chemical Formula

While comparing Legrandite 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 Legrandite and Sillimanite chemical formula.

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Legrandite and Sillimanite Specific Gravity

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

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Yellow Gemstones


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