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Smithsonite
Smithsonite

Mottramite
Mottramite



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Smithsonite
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Mottramite

Smithsonite and Mottramite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Greasy

Pleochroism

-
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.620-1.8502.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Orthorhombic

Birefringence

0.223-0.2270.150
0 0.296
👆🏻

Clarity

Translucent
-

Smithsonite and Mottramite Optic Character

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

Smithsonite and Mottramite Transparency

Similar to their colors, Smithsonite 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, Smithsonite is Translucent while Smithsonite is Translucent in appearance.