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Moonstone
Moonstone

Sugilite
Sugilite



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Moonstone
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Sugilite

Moonstone and Sugilite Optical Properties

Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
Weak

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent, Transparent to translucent
Translucent

Refractive Index

1.518-1.5271.607-1.612
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.006-0.0070.003
0 0.296
👆🏻

Clarity

Transparent
Translucent

Moonstone and Sugilite Optic Character

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

Moonstone and Sugilite Transparency

Similar to their colors, Moonstone and Sugilite 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, Moonstone is Transparent and Transparent to translucent while Moonstone is Transparent and Transparent to translucent in appearance.