Diamond and Andalusite Optical Properties

Diamond

Andalusite

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Optical Properties

Luster

Adamantine

Vitreous, Greasy

Pleochroism

None

strongly trichroic

Dispersion

0.040.02

0.005 1

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Transparency

Transparent, Translucent, Transparent to opaque

Transparent, Translucent

Refractive Index

2.417-2.4191.627-1.650

1 3.25

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Optic Character

Crystal System

cubic

Orthorhombic

Birefringence

-99990.009-0.010

0 0.296

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Clarity

Transparent

Diamond and Andalusite Optic Character

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

Similar to their colors, Diamond and Andalusite 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.