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Prasiolite and London blue topaz Optical Properties


London blue topaz and Prasiolite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Very weak: light green pale greenWalter Schumann   
Not Available   

Dispersion
0.01   
27
Not Available   

Transparency
Transparent, Translucent   
Not Available   

Refractive Index
1.544-1.553   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.009   
Not Available   

Clarity
Transparent   
Not Available   

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Prasiolite and London blue topaz Optic Character

Prasiolite and London blue topaz optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Prasiolite and London blue topaz 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 Prasiolite and London blue topaz 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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Prasiolite and London blue topaz Transparency

Similar to their colors, Prasiolite and London blue topaz 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, Prasiolite is Translucent and Transparent while Prasiolite is Translucent and Transparent in appearance.

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