Linarite and Onyx Optical Properties

Linarite

Onyx

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1 Optical Properties

1.1 Luster

Sub-Adamantine, Vitreous

Vitreous

1.2 Pleochroism

X = pale blue; Y = blue; Z = Prussian blue

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Translucent, Opaque, Translucent to opaque

1.5 Refractive Index

1.809-1.8591.530-1.543

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Trigonal

1.8 Birefringence

0.050Not Available

0 0.296

1.9 Clarity

Transparent

OpaqueHerve Nicolas Lazzarelli

Linarite and Onyx Optic Character

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

Similar to their colors, Linarite 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, Linarite is Transparent while Linarite is Transparent in appearance.