Onyx and Oligoclase Optical Properties

Onyx

Oligoclase

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent, Opaque, Translucent to opaque

Gemmological Tables (2004)

1.5 Refractive Index

1.530-1.5431.538-1.550

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

Not Available0.010

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

TransparentUlrich Henn and Claudio C. Milisenda

Onyx and Oligoclase Optic Character

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

Compare Gems for Capricorn » More

Onyx Vs Quartz Smoky

Onyx Vs Hawks Eye

Onyx Vs Crystal Quartz

» More

More Compare Gems for Capricorn

Onyx and Oligoclase Transparency

Similar to their colors, Onyx and Oligoclase 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.