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Sunstone and Petalite Physical Properties


Petalite and Sunstone Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.62-2.65   
2.40   

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

Cleavage
001   
Perfect on {001}, poor on {201} with 38.5° angle between the two   

Mohs Hardness
6   
6-6.5   

Chemical Composition
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8   
LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Sunstone and Petalite Chemical Formula

While comparing Sunstone 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 Sunstone and Petalite chemical formula.

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Sunstone and Petalite Specific Gravity

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

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