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Onyx
Onyx

Rubellite
Rubellite



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Onyx
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Rubellite

Onyx and Rubellite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Not Available
Strong: dark red pinkish-redHerve Nicolas Lazzarelli
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Opaque, Translucent to opaque
Transparent, Translucent
1.5 Refractive Index
1.530-1.5431.614-1.666
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
Not Available0.014-0.040
Achroite
0 0.296
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent

Onyx and Rubellite Optic Character

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

Onyx and Rubellite Transparency

Similar to their colors, Onyx and Rubellite 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, Onyx is Opaque, Translucent and Translucent to opaque while Onyx is Opaque, Translucent and Translucent to opaque in appearance.