Sinhalite and Onyx Optical Properties

Sinhalite

Onyx

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Translucent, Opaque, Translucent to opaque

1.5 Refractive Index

1.665-1.7121.530-1.543

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.036-0.042Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

OpaqueHerve Nicolas Lazzarelli

Sinhalite and Onyx Optic Character

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

Sinhalite Vs Tinzenite

Sinhalite Vs Tigers Eye

Sinhalite Vs Tavorite

Sinhalite and Onyx Transparency

Similar to their colors, Sinhalite and Onyx 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, Sinhalite is Gemmological Tables (2004) More from other references while Sinhalite is Gemmological Tables (2004) More from other references in appearance.