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Cordierite
Cordierite

Eosphorite
Eosphorite



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X
Cordierite
X
Eosphorite

Cordierite and Eosphorite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Resinous

Pleochroism

X = pale yellow
Visible: X = yellow; Y = pink; Z = pale pink to colorless

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

-99991.639-1.672
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

-99990.029-0.032
0 0.296
👆🏻

Clarity

-
Transparent

Cordierite and Eosphorite Optic Character

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

Similar to their colors, Cordierite and Eosphorite 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.