Diamond and Dumortierite Optical Properties

Diamond

Dumortierite

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Optical Properties

Luster

Adamantine

Vitreous

Pleochroism

None

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

Dispersion

0.040.01

0.005 1

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Transparency

Transparent, Translucent, Transparent to opaque

Translucent, Translucent to opaque

Refractive Index

2.417-2.4191.669-1.723

1 3.25

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Optic Character

Crystal System

cubic

Orthorhombic

Birefringence

-99990.011-0.037

0 0.296

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Clarity

Transparent

Translucent

Diamond and Dumortierite Optic Character

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

Similar to their colors, Diamond and Dumortierite 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.