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Chalcedony
Chalcedony

Spodumene
Spodumene



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Chalcedony
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Spodumene

Chalcedony and Spodumene Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Strong in kunzite: α-purple

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent, Translucent to opaque
Transparent

Refractive Index

1.530-1.5431.657-1.681
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.003-0.0090.014-0.018
0 0.296
👆🏻

Clarity

Translucent
-

Chalcedony and Spodumene Optic Character

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

Chalcedony and Spodumene Transparency

Similar to their colors, Chalcedony and Spodumene 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, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.