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Cordierite
Cordierite

Verdite
Verdite



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X
Cordierite
X
Verdite

Cordierite and Verdite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Silky

Pleochroism

X = pale yellow
Extreme

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

-99991.580
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

-
Translucent

Cordierite and Verdite Optic Character

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

Cordierite and Verdite Transparency

Similar to their colors, Cordierite and Verdite 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, Cordierite is while Cordierite is in appearance.