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Arfvedsonite
Arfvedsonite

Mottramite
Mottramite



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Arfvedsonite
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Mottramite

Arfvedsonite and Mottramite Optical Properties

Optical Properties

Luster

Vitreous
Greasy

Pleochroism

Strong: Blue-greens
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.652-1.6992.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

-99990.150
0 0.296
👆🏻

Clarity

-
-

Arfvedsonite and Mottramite Optic Character

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

Similar to their colors, Arfvedsonite and Mottramite 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.