Beryllonite and Antigorite Optical Properties

Beryllonite

Antigorite

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Optical Properties

Luster

Vitreous, Adamantine, Pearly

Waxy, Silky, Resinous, Greasy

Pleochroism

pale greenish yellow

Dispersion

0.010.02

0.005 1

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Transparency

Translucent

Refractive Index

1.552-1.5621.530-1.575

1 3.25

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Optic Character

Crystal System

monoclinic

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

Birefringence

0.009-9999

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Beryllonite and Antigorite Optic Character

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

Similar to their colors, Beryllonite and Antigorite 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, Beryllonite is while Beryllonite is in appearance.