Lizardite and Onyx Optical Properties

Lizardite

Onyx

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentAnthony et al, Handbook of mineralogy (2001)

Translucent, Opaque, Translucent to opaque

1.5 Refractive Index

1.538-1.5601.530-1.543

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentAnthony et al

OpaqueHerve Nicolas Lazzarelli

Lizardite and Onyx Optic Character

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

Similar to their colors, Lizardite 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, Lizardite is Handbook of mineralogy (2001) and TranslucentAnthony et al while Lizardite is Handbook of mineralogy (2001) and TranslucentAnthony et al in appearance.