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Verdelite
Verdelite

Mottramite
Mottramite



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Verdelite
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Mottramite

Verdelite and Mottramite Optical Properties

Optical Properties

Luster

-
Greasy

Pleochroism

Strong: dark green yellow
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.614-1.6662.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.014-0.0400.150
0 0.296
👆🏻

Clarity

Transparent
-

Verdelite and Mottramite Optic Character

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

Verdelite and Mottramite Transparency

Similar to their colors, Verdelite 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, Verdelite is Transparent and Translucent while Verdelite is Transparent and Translucent in appearance.