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Demantoid and Turquoise Optical Properties


Turquoise and Demantoid Optical Properties


Optical Properties

Luster
Adamantine   
Waxy   

Pleochroism
None   
Weak   

Dispersion
Not Available   
None   

Transparency
Gemmological Tables (2004)   
Translucent, Opaque   

Refractive Index
1.880-1.890   
1.610-1.650   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Triclinic   

Birefringence
Not Available   
0.040   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Translucent   

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<< Physical Properties

Demantoid and Turquoise Optic Character

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

Similar to their colors, Demantoid and Turquoise 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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