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Willemite
Willemite

Antigorite
Antigorite



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Willemite
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Antigorite

Willemite and Antigorite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Waxy, Silky, Resinous, Greasy

Pleochroism

-
pale greenish yellow

Dispersion

0.170.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent

Refractive Index

1.687-1.7231.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.028-0.030-9999
0 0.296
👆🏻

Clarity

Transparent
Translucent

Willemite and Antigorite Optic Character

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

Willemite and Antigorite Transparency

Similar to their colors, Willemite 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, Willemite is Transparent and Translucent while Willemite is Transparent and Translucent in appearance.