Labradorite and Tugtupite Optical Properties

Labradorite

Tugtupite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Not Available

1.2 Pleochroism

From the Congo

ModerateArthur Thomas

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

OpaqueHerve Nicolas Lazzarelli

1.5 Refractive Index

1.554-1.5731.494-1.504

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

tetragonal

1.8 Birefringence

0.008-0.0100.008

0 0.296

1.9 Clarity

Transparent

OpaqueHerve Nicolas Lazzarelli

Labradorite and Tugtupite Optic Character

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

Similar to their colors, Labradorite and Tugtupite 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, Labradorite is Translucent, Transparent and Transparent to translucent while Labradorite is Translucent, Transparent and Transparent to translucent in appearance.