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Sapphire and Verdelite Optical Properties


Verdelite and Sapphire Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Vitreous, Adamantine   
Not Available   

Pleochroism
Strong   
Strong: dark green yellow   

Dispersion
0.02   
21
0.02   
22

Transparency
Transparent, Translucent, Transparent to opaque   
Transparent, Translucent   

Refractive Index
1.762-1.788   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.008-0.009   
0.014-0.040   

Clarity
Transparent   
Transparent   

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Sapphire and Verdelite Optic Character

Sapphire and Verdelite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sapphire and Verdelite 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 Sapphire and Verdelite 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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Sapphire and Verdelite Transparency

Similar to their colors, Sapphire and Verdelite 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.

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