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Sphene and Demantoid Optical Properties


Demantoid and Sphene Optical Properties


Optical Properties

Luster
Not Available   
Adamantine   

Pleochroism
Not Available   
None   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Gemmological Tables (2004)   

Refractive Index
1.84-2.11   
1.880-1.890   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
cubic   

Birefringence
Not Available   
Not Available   

Clarity
Color grading system   
TransparentUlrich Henn and Claudio C. Milisenda   

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<< Physical Properties

Sphene and Demantoid Optic Character

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

Similar to their colors, Sphene 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, Sphene is Not Available while Sphene is Not Available in appearance.

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