×

Onyx
Onyx

Anhydrite
Anhydrite



ADD
Compare
X
Onyx
X
Anhydrite

Onyx and Anhydrite Optical Properties

Add ⊕
1 Optical Properties
1.1 Luster
Vitreous
Pearly, Greasy
1.2 Pleochroism
Not Available
For violet varieties
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Opaque, Translucent to opaque
Transparent
1.5 Refractive Index
1.530-1.5431.570-1.614
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
Not Available0.042-0.044
Achroite
0 0.296
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent

Onyx and Anhydrite Optic Character

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

Similar to their colors, Onyx and Anhydrite 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.