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Tortoiseshell
Tortoiseshell

Vesuvianite
Vesuvianite



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Tortoiseshell
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Vesuvianite

Tortoiseshell and Vesuvianite Optical Properties

Optical Properties

Luster

-
Vitreous, Resinous

Pleochroism

-
slight in colored varieties

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.540-1.5601.703-1.752
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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tetragonal

Birefringence

-99990.004-0.006
0 0.296
👆🏻

Clarity

OpaqueUlrich Henn and Claudio C. Milisenda
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Tortoiseshell and Vesuvianite Optic Character

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

Tortoiseshell and Vesuvianite Transparency

Similar to their colors, Tortoiseshell and Vesuvianite 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, Tortoiseshell is while Tortoiseshell is in appearance.