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Peridot
Peridot

Antigorite
Antigorite



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Peridot
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Antigorite

Peridot and Antigorite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Waxy, Silky, Resinous, Greasy

Pleochroism

Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
pale greenish yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.64-1.691.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.036-9999
0 0.296
👆🏻

Clarity

Transparent
Translucent

Peridot and Antigorite Optic Character

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

Peridot and Antigorite Transparency

Similar to their colors, Peridot 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, Peridot is Transparent while Peridot is Transparent in appearance.