Antigorite and Beryllonite Optical Properties

Antigorite

Beryllonite

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Optical Properties

Luster

Waxy, Silky, Resinous, Greasy

Vitreous, Adamantine, Pearly

Pleochroism

pale greenish yellow

Dispersion

0.020.01

0.005 1

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Transparency

Translucent

Refractive Index

1.530-1.5751.552-1.562

1 3.25

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Optic Character

Crystal System

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

monoclinic

Birefringence

-99990.009

0 0.296

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Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Antigorite and Beryllonite Optic Character

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

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Antigorite and Beryllonite Transparency

Similar to their colors, Antigorite and Beryllonite 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.