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Prasiolite
Prasiolite

Cuprite
Cuprite



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Prasiolite
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Cuprite

Prasiolite and Cuprite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

Very weak: light green pale greenWalter Schumann
visible

Dispersion

0.010.05
0.005 1
👆🏻

Transparency

Transparent, Translucent
TranslucentWalter Schumann

Refractive Index

1.544-1.5532.849
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
cubic

Birefringence

0.009-9999
0 0.296
👆🏻

Clarity

Transparent
TranslucentWalter Schumann

Prasiolite and Cuprite Optic Character

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

Prasiolite and Cuprite Transparency

Similar to their colors, Prasiolite and Cuprite 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, Prasiolite is Transparent and Translucent while Prasiolite is Transparent and Translucent in appearance.