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Omphacite
Omphacite

Chrysoberyl
Chrysoberyl



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Omphacite
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Chrysoberyl

Omphacite and Chrysoberyl Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak: colorless -- very pale green -- very pale green
X = red; Y = yellow-orange; Z = emerald-green

Dispersion

0.020.02
0.005 1
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Transparency

TranslucentAnthony et al
Transparent, Translucent, Transparent to translucent

Refractive Index

1.662-1.7231.746-1.763
1 3.25
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Optic Character

-
Biaxial/+

Crystal System

-
Orthorhombic

Birefringence

-99990.007-0.013
0 0.296
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Clarity

TranslucentAnthony et al
Transparent

Omphacite and Chrysoberyl Optic Character

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

Omphacite and Chrysoberyl Transparency

Similar to their colors, Omphacite 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, Omphacite is TranslucentAnthony et al while Omphacite is TranslucentAnthony et al in appearance.