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Sardonyx
Sardonyx

Ruby
Ruby



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Sardonyx
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Ruby

Sardonyx and Ruby Optical Properties

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Optical Properties

Luster

-
Vitreous, Adamantine

Pleochroism

-
Strong: purplish-red

Dispersion

0.010.02
0.005 1
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Transparency

Translucent
Transparent, Translucent, Transparent to opaque

Refractive Index

1.530-1.5431.762-1.778
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.008-0.0100.008
0 0.296
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Clarity

Translucent
Transparent

Sardonyx and Ruby Optic Character

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

Sardonyx and Ruby Transparency

Similar to their colors, Sardonyx and Ruby 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.