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Arfvedsonite
Arfvedsonite

Thulite
Thulite



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Arfvedsonite
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Thulite

Arfvedsonite and Thulite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong: Blue-greens
Present

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.652-1.6991.695
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

-99990.006-0.018
0 0.296
👆🏻

Clarity

-
OpaqueHerve Nicolas Lazzarelli

Arfvedsonite and Thulite Optic Character

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

Arfvedsonite and Thulite Transparency

Similar to their colors, Arfvedsonite 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, Arfvedsonite is while Arfvedsonite is in appearance.