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Mottramite
Mottramite

Prasiolite
Prasiolite



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Mottramite
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Prasiolite

Mottramite and Prasiolite Optical Properties

Optical Properties

Luster

Greasy
Vitreous

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Very weak: light green pale greenWalter Schumann

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

2.1701.544-1.553
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.1500.009
0 0.296
👆🏻

Clarity

-
Transparent

Mottramite and Prasiolite Optic Character

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

Similar to their colors, Mottramite and Prasiolite 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.