Chrysoberyl and Dumortierite Optical Properties

Chrysoberyl

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

X = red; Y = yellow-orange; Z = emerald-green

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

1.3 Dispersion

0.02None

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Translucent, Translucent to opaque

1.5 Refractive Index

1.746-1.7631.669-1.723

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.007-0.0130.011-0.037

0 0.296

1.9 Clarity

Transparent

Translucent

Chrysoberyl and Dumortierite Optic Character

Chrysoberyl and Dumortierite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chrysoberyl 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 Chrysoberyl 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. Chrysoberyl has Biaxial/+ character.

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Chrysoberyl and Dumortierite Transparency

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