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Cordierite
Cordierite

Lepidolite
Lepidolite



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X
Cordierite
X
Lepidolite

Cordierite and Lepidolite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Pearly

Pleochroism

X = pale yellow
X = almost colorless; Y = Z = pink

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

-99991.525-1.587
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Triclinic

Birefringence

-99990.0290-0.0380
0 0.296
👆🏻

Clarity

-
Transparent

Cordierite and Lepidolite Optic Character

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

Similar to their colors, Cordierite and Lepidolite 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.