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Chalcedony and London blue topaz Optical Properties


London blue topaz and Chalcedony Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
None   
Not Available   

Transparency
Translucent, Translucent to opaque   
Not Available   

Refractive Index
1.530-1.543   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.003-0.009   
Not Available   

Clarity
Translucent   
Not Available   

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Chalcedony and London blue topaz Optic Character

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

Similar to their colors, Chalcedony 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, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.

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