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Sugilite
Sugilite

Meionite
Meionite



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Sugilite
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Meionite

Sugilite and Meionite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Weak
-

Dispersion

0.020.02
0.005 1
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Transparency

Translucent
Transparent, Translucent

Refractive Index

1.607-1.6121.556-1.600
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
-

Birefringence

0.0030.024-0.037
0 0.296
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Clarity

Translucent
Transparent

Sugilite and Meionite Optic Character

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

Similar to their colors, Sugilite and Meionite 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.