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Chrysoprase
Chrysoprase

Prase
Prase



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Chrysoprase
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Prase

Chrysoprase and Prase Optical Properties

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Optical Properties

Luster

Vitreous, Waxy
-

Pleochroism

-
-

Dispersion

0.010.01
0.005 1
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Transparency

Translucent, Opaque, Translucent to nearly opaque
Transparent, Translucent

Refractive Index

1.530-1.5431.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
-

Birefringence

0.0040.009
0 0.296
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Clarity

Translucent
Transparent

Chrysoprase and Prase Optic Character

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

Chrysoprase and Prase Transparency

Similar to their colors, Chrysoprase and Prase 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, Chrysoprase is Translucent, Opaque and Translucent to nearly opaque while Chrysoprase is Translucent, Opaque and Translucent to nearly opaque in appearance.