Tugtupite and Tortoiseshell Optical Properties

Tugtupite

Tortoiseshell

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

ModerateArthur Thomas

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

OpaqueHerve Nicolas Lazzarelli

Gemmological Tables (2004)

1.5 Refractive Index

1.494-1.5041.540-1.560

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

0.008Not Available

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

OpaqueUlrich Henn and Claudio C. Milisenda

Tugtupite and Tortoiseshell Optic Character

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

Similar to their colors, Tugtupite and Tortoiseshell 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, Tugtupite is OpaqueHerve Nicolas Lazzarelli while Tugtupite is OpaqueHerve Nicolas Lazzarelli in appearance.