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Franklinite
Franklinite

Euclase
Euclase



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Franklinite
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Euclase

Franklinite and Euclase Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak: colorless-(greenish) yellow

Dispersion

0.190.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

-99991.650-1.677
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

-99990.019-0.025
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Franklinite and Euclase Optic Character

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

Franklinite and Euclase Transparency

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