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Moonstone
Moonstone

Thulite
Thulite



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Moonstone
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Thulite

Moonstone and Thulite Optical Properties

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Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
Present

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent, Transparent to translucent
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.518-1.5271.695
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

0.006-0.0070.006-0.018
0 0.296
👆🏻

Clarity

Transparent
OpaqueHerve Nicolas Lazzarelli

Moonstone and Thulite Optic Character

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

Similar to their colors, Moonstone and Thulite 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.