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Crocoite
Crocoite

Mottramite
Mottramite



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Crocoite
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Mottramite

Crocoite and Mottramite Optical Properties

Optical Properties

Luster

Adamantine
Greasy

Pleochroism

Distinctly trichroic
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

2.31-2.662.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n
Orthorhombic

Birefringence

-99990.150
0 0.296
👆🏻

Clarity

Transparent
-

Crocoite and Mottramite Optic Character

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

Crocoite and Mottramite Transparency

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