Chrysoberyl and Amblygonite Optical Properties

Chrysoberyl

Amblygonite

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Optical Properties

Luster

Vitreous

Vitreous, Pearly

Pleochroism

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

weak to none

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

Refractive Index

1.746-1.7631.578-1.646

1 3.25

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Optic Character

Biaxial/+

Crystal System

Orthorhombic

Triclinic

Birefringence

0.007-0.0130.020-0.030

0 0.296

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Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Chrysoberyl and Amblygonite Optic Character

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

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Chrysoberyl and Amblygonite Transparency

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