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Tortoiseshell
Tortoiseshell

Ammolite
Ammolite



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Tortoiseshell
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Ammolite

Tortoiseshell and Ammolite Optical Properties

Optical Properties

Luster

-
Silky, Vitreous

Pleochroism

-
None

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.540-1.5601.520-1.670
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.135-0.145
0 0.296
👆🏻

Clarity

OpaqueUlrich Henn and Claudio C. Milisenda
-

Tortoiseshell and Ammolite Optic Character

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

Similar to their colors, Tortoiseshell and Ammolite 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.