Spinel and Phenakite Optical Properties

Spinel

Phenakite

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

Vitreous

Absent

0.02

Transparent, Translucent, Transparent to translucent

1.73

Isometric

-9999

TransparentUlrich Henn and Claudio C. Milisenda

Vitreous

Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli

0.02

1.650-1.695

Trigonal

0.016

TransparentUlrich Henn and Claudio C. Milisenda

Spinel and Phenakite Optic Character

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

Similar to their colors, Spinel and Phenakite 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, Spinel is Transparent, Translucent and Transparent to translucent while Spinel is Transparent, Translucent and Transparent to translucent in appearance.