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Demantoid and Wavellite Optical Properties


Wavellite and Demantoid Optical Properties


Optical Properties

Luster
Adamantine   
Vitreous, Resinous, Pearly   

Pleochroism
None   
Weak   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Gems   

Refractive Index
1.880-1.890   
1.518-1.561   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Orthorhombic   

Birefringence
Not Available   
0.025   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Gems   

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Demantoid and Wavellite Optic Character

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

Similar to their colors, Demantoid and Wavellite 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, Demantoid is Gemmological Tables (2004) while Demantoid is Gemmological Tables (2004) in appearance.

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