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Titanite
Titanite

Tortoiseshell
Tortoiseshell



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Titanite
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Tortoiseshell

Titanite and Tortoiseshell Optical Properties

Optical Properties

Luster

Subadamantine, Resinous
-

Pleochroism

Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange
-

Dispersion

0.050.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.885-1.9901.540-1.560
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.105-0.135-9999
0 0.296
👆🏻

Clarity

-
OpaqueUlrich Henn and Claudio C. Milisenda

Titanite and Tortoiseshell Optic Character

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

Titanite and Tortoiseshell Transparency

Similar to their colors, Titanite 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, Titanite is while Titanite is in appearance.