Esperite and Tortoiseshell Optical Properties

Esperite

Tortoiseshell

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Optical Properties

Luster

Vitreous

Pleochroism

colorless.

Dispersion

0.020.01

0.005 1

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Transparency

OpaqueAnthony et al, Opaque, Transparent

Refractive Index

1.760-1.7741.540-1.560

1 3.25

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Optic Character

Crystal System

monoclinic

Birefringence

0.012-9999

0 0.296

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Clarity

OpaqueAnthony et al

OpaqueUlrich Henn and Claudio C. Milisenda

Esperite and Tortoiseshell Optic Character

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

Similar to their colors, Esperite 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, Esperite is OpaqueAnthony et al, Opaque and Transparent while Esperite is OpaqueAnthony et al, Opaque and Transparent in appearance.