Chrysoberyl and Clinochlore Optical Properties

Chrysoberyl

Clinochlore

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1 Optical Properties

1.1 Luster

Vitreous

Pearly, Greasy

1.2 Pleochroism

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

Distinct: light yellow-green to light bluE

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent

1.5 Refractive Index

1.746-1.7631.571-1.597

1 3.25

1.6 Optic Character

Biaxial/+

1.7 Crystal System

Orthorhombic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

1.8 Birefringence

0.007-0.013Not Available

0 0.296

1.9 Clarity

Transparent

Chrysoberyl and Clinochlore Optic Character

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

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Chrysoberyl and Clinochlore Transparency

Similar to their colors, Chrysoberyl and Clinochlore 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.