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Diamond and Topaz Optical Properties


Topaz and Diamond Optical Properties


Optical Properties

Luster
Adamantine   
Vitreous   

Pleochroism
None   
Weak   

Dispersion
0.04   
10
0.01   
26

Transparency
Transparent, Translucent, Transparent to opaque   
Transparent   

Refractive Index
2.417-2.419   
1.606-1.644   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Orthorhombic   

Birefringence
Not Available   
0.008-0.011   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Diamond and Topaz Optic Character

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

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

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