Petalite and Vishnevite Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.40
Not Available
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Brittle, Uneven
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Perfect
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available
Petalite and Vishnevite Chemical Formula
While comparing Petalite and Vishnevite 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 Petalite and Vishnevite chemical formula.
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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Petalite and Vishnevite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Petalite and Vishnevite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Vishnevite Optical Properties during the identification of gemstone. Specific gravity of Petalite is Not Available whereas that of Vishnevite is Not Available.