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Uvite
Uvite

Mottramite
Mottramite



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Uvite
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Mottramite

Uvite and Mottramite Optical Properties

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Optical Properties

Luster

Vitreous
Greasy

Pleochroism

Pale yellow colorlessAnthony et al
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.020.04
0.005 1
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Transparency

Transparent
-

Refractive Index

1.614-1.6662.170
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.014-0.0320.150
0 0.296
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Clarity

Transparent
-

Uvite and Mottramite Optic Character

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

Uvite and Mottramite Transparency

Similar to their colors, Uvite 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, Uvite is Transparent while Uvite is Transparent in appearance.