Antigorite and Chrysoberyl Optical Properties

Antigorite

Chrysoberyl

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Optical Properties

Luster

Waxy, Silky, Resinous, Greasy

Vitreous

Pleochroism

pale greenish yellow

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

Dispersion

0.020.02

0.005 1

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Transparency

Translucent

Transparent, Translucent, Transparent to translucent

Refractive Index

1.530-1.5751.746-1.763

1 3.25

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Optic Character

Biaxial/+

Crystal System

Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Orthorhombic

Birefringence

-99990.007-0.013

0 0.296

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Clarity

Translucent

Transparent

Antigorite and Chrysoberyl Optic Character

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

Similar to their colors, Antigorite 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, Antigorite is Translucent while Antigorite is Translucent in appearance.