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Verdelite and Demantoid Optical Properties


Demantoid and Verdelite Optical Properties


Optical Properties

Luster
Not Available   
Adamantine   

Pleochroism
Strong: dark green yellow   
None   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent, Translucent   
Gemmological Tables (2004)   

Refractive Index
1.614-1.666   
1.880-1.890   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
cubic   

Birefringence
0.014-0.040   
Not Available   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Verdelite and Demantoid Optic Character

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

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

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