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Cordierite
Cordierite

Anorthite
Anorthite



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X
Cordierite
X
Anorthite

Cordierite and Anorthite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous

Pleochroism

X = pale yellow
colorless.

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

-99991.575-1.588
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Triclinic

Birefringence

-99990.012-0.013
0 0.296
👆🏻

Clarity

-
Transparent

Cordierite and Anorthite Optic Character

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

Similar to their colors, Cordierite and Anorthite 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.