Indicolite Blue Tourmaline and Onyx Optical Properties

Indicolite Blue Tourmaline

Onyx

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Strong: dark blue light blueWalter Schumann

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent

Translucent, Opaque, Translucent to opaque

1.5 Refractive Index

1.614-1.6661.530-1.543

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

0.014-0.040Not Available

0 0.296

1.9 Clarity

Transparent

OpaqueHerve Nicolas Lazzarelli

Indicolite Blue Tourmaline and Onyx Optic Character

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

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Indicolite Blue Tourmaline and Onyx Transparency

Similar to their colors, Indicolite Blue Tourmaline 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, Indicolite Blue Tourmaline is Translucent and Transparent while Indicolite Blue Tourmaline is Translucent and Transparent in appearance.