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Mottramite
Mottramite

Uvite
Uvite



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Mottramite
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Uvite

Mottramite and Uvite Optical Properties

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Optical Properties

Luster

Greasy
Vitreous

Pleochroism

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

Dispersion

0.040.02
0.005 1
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Transparency

-
Transparent

Refractive Index

2.1701.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.1500.014-0.032
0 0.296
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Clarity

-
Transparent

Mottramite and Uvite Optic Character

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

Mottramite and Uvite Transparency

Similar to their colors, Mottramite and Uvite 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, Mottramite is while Mottramite is in appearance.