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Mottramite
Mottramite

Variscite
Variscite



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Mottramite
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Variscite

Mottramite and Variscite Optical Properties

Optical Properties

Luster

Greasy
Vitreous, Waxy

Pleochroism

Visible X=Y= canary yellow to greenish yellow
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
Translucent, Opaque . May be translucent when backlit on the edges.

Refractive Index

2.1701.560-1.594
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.1500.031
0 0.296
👆🏻

Clarity

-
Translucent

Mottramite and Variscite Optic Character

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

Similar to their colors, Mottramite and Variscite 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.