Chrysoberyl and Chlorastrolite Optical Properties

Chrysoberyl

Chlorastrolite

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1 Optical Properties

1.1 Luster

Vitreous

Chatoyant

1.2 Pleochroism

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

NilArthur Thomas

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Gems

1.5 Refractive Index

1.746-1.7631.7

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.007-0.0130.010

0 0.296

1.9 Clarity

Transparent

Gems

Chrysoberyl and Chlorastrolite Optic Character

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

Similar to their colors, Chrysoberyl and Chlorastrolite 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.