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Prasiolite
Prasiolite

Sonolite
Sonolite



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Prasiolite
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Sonolite

Prasiolite and Sonolite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Very weak: light green pale greenWalter Schumann
-

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Translucent
TransparentAnthony et al

Refractive Index

1.544-1.5531.763-1.793
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
-

Birefringence

0.009-9999
0 0.296
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Clarity

Transparent
TransparentAnthony et al

Prasiolite and Sonolite Optic Character

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

Similar to their colors, Prasiolite and Sonolite 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.