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Sugilite
Sugilite

Taaffeite
Taaffeite



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Sugilite
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Taaffeite

Sugilite and Taaffeite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak
Weak

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.607-1.6121.70-1.73
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Hexagonal

Birefringence

0.0030.055
0 0.296
👆🏻

Clarity

Translucent
-

Sugilite and Taaffeite Optic Character

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

Sugilite and Taaffeite Transparency

Similar to their colors, Sugilite and Taaffeite 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, Sugilite is Translucent while Sugilite is Translucent in appearance.