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Sardonyx
Sardonyx

Axinite
Axinite



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Sardonyx
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Axinite

Sardonyx and Axinite Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Strong

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.530-1.5431.656-1.704
1 3.25
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Optic Character

-
Biaxial/+

Crystal System

-
Triclinic

Birefringence

0.008-0.0100.009-0.012
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Sardonyx and Axinite Optic Character

Sardonyx and Axinite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sardonyx and Axinite 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 Sardonyx and Axinite 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. Axinite has Biaxial/+ character.

Sardonyx and Axinite Transparency

Similar to their colors, Sardonyx and Axinite 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, Sardonyx is Translucent while Sardonyx is Translucent in appearance.