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Vesuvianite
Vesuvianite

Mottramite
Mottramite



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Vesuvianite
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Mottramite

Vesuvianite and Mottramite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Greasy

Pleochroism

slight in colored varieties
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.030.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.703-1.7522.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Orthorhombic

Birefringence

0.004-0.0060.150
0 0.296
👆🏻

Clarity

-
-

Vesuvianite and Mottramite Optic Character

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

Vesuvianite and Mottramite Transparency

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