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Williamsite and Petalite Physical Properties


Petalite and Williamsite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.51-2.63   
2.40   

Fracture
Conchoidal, Conchoidal, Handbook of mineralogy (2001)   
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal   

Cleavage
Not Available   
Perfect on {001}, poor on {201} with 38.5° angle between the two   

Mohs Hardness
4   
6-6.5   

Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)   
LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Williamsite and Petalite Chemical Formula

While comparing Williamsite and Petalite 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 Williamsite and Petalite chemical formula.

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Williamsite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Williamsite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Williamsite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Williamsite is 2.40 whereas that of Petalite is 2.40.

Green Gemstones

Green Gemstones


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