Diamond and Iolite Optical Properties

Diamond

Iolite

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

Adamantine

None

0.04

Transparent, Translucent, Transparent to opaque

2.417-2.419

cubic

-9999

Transparent

Vitreous

0.02

Transparent, Translucent, Transparent to translucent

1.52-1.56

Orthorhombic

-9999

Transparent to translucent

Diamond and Iolite Optic Character

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

Similar to their colors, Diamond and Iolite 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, Diamond is Transparent, Translucent and Transparent to opaque while Diamond is Transparent, Translucent and Transparent to opaque in appearance.