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Sugilite
Sugilite

Aegirine
Aegirine



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Sugilite
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Aegirine

Sugilite and Aegirine Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Weak
Emerald green

Dispersion

0.020.01
0.005 1
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Transparency

Translucent
-

Refractive Index

1.607-1.6121.720-1.778
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
monoclinic

Birefringence

0.0030.037-0.061
0 0.296
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Clarity

Translucent
-

Sugilite and Aegirine Optic Character

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

Similar to their colors, Sugilite and Aegirine 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.