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Augite
Augite

Antigorite
Antigorite



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Augite
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Antigorite

Augite and Antigorite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Waxy, Silky, Resinous, Greasy

Pleochroism

Pale green
pale greenish yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Translucent

Refractive Index

1.671-1.7741.530-1.575
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

-9999-9999
0 0.296
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Clarity

Transparent
Translucent

Augite and Antigorite Optic Character

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

Augite and Antigorite Transparency

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