Chrysoprase and Chrysoberyl Optical Properties

Chrysoprase

Chrysoberyl

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1 Optical Properties

1.1 Luster

Vitreous, Vitreous, Waxy

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

None0.02

0.007 1

1.4 Transparency

Translucent, Translucent, Opaque, Translucent to nearly opaque

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.530-1.5431.746-1.763

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Trigonal

Orthorhombic

1.8 Birefringence

0.0040.007-0.013

0 0.296

1.9 Clarity

Translucent

Transparent

Chrysoprase and Chrysoberyl Optic Character

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

Similar to their colors, Chrysoprase and Chrysoberyl 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, Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque while Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque in appearance.