Shattuckite and Onyx Optical Properties

Shattuckite

Onyx

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1 Optical Properties

1.1 Luster

Silky

Vitreous

1.2 Pleochroism

X = very pale blue; Y = pale blue; Z = deep blue

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Translucent, Opaque, Translucent to opaque

1.5 Refractive Index

1.752-1.8151.530-1.543

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.063Not Available

0 0.296

1.9 Clarity

Translucent

OpaqueHerve Nicolas Lazzarelli

Shattuckite and Onyx Optic Character

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

Similar to their colors, Shattuckite 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, Shattuckite is Translucent while Shattuckite is Translucent in appearance.