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Mottramite
Mottramite

Euclase
Euclase



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Mottramite
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Euclase

Mottramite and Euclase Optical Properties

Optical Properties

Luster

Greasy
Vitreous

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Weak: colorless-(greenish) yellow

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.1701.650-1.677
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.1500.019-0.025
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Mottramite and Euclase Optic Character

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

Similar to their colors, Mottramite and Euclase 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.