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Violane
Violane

Spinel
Spinel



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Violane
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Spinel

Violane and Spinel Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Absent

Dispersion

0.030.02
0.005 1
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Transparency

Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.668-1.7031.73
1 3.25
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Optic Character

-
-

Crystal System

-
Isometric

Birefringence

0.024-0.030-9999
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Violane and Spinel Optic Character

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

Violane and Spinel Transparency

Similar to their colors, Violane and Spinel 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, Violane is Translucent while Violane is Translucent in appearance.