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Pleonaste and Vishnevite Optical Properties


Vishnevite and Pleonaste Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Pearly   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Not Available   

Refractive Index
1.780   
1.490-1.507   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Hexagonal   

Birefringence
Not Available   
0.002-0.012   

Clarity
Gemmological Tables (2004)   
Not Available   

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<< Physical Properties

Pleonaste and Vishnevite Optic Character

Pleonaste and Vishnevite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Pleonaste and Vishnevite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Pleonaste and Vishnevite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Pleonaste and Vishnevite Transparency

Similar to their colors, Pleonaste and Vishnevite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Pleonaste is Gemmological Tables (2004) while Pleonaste is Gemmological Tables (2004) in appearance.

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