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Franklinite
Franklinite

Williamsite
Williamsite



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Franklinite
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Williamsite

Franklinite and Williamsite Optical Properties

Optical Properties

Luster

-
Waxy, Silky, Resinous, Greasy

Pleochroism

-
-

Dispersion

0.190.03
0.005 1
👆🏻

Transparency

Translucent
TranslucentHerve Nicolas Lazzarelli

Refractive Index

-99991.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
-

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Translucent
TranslucentHerve Nicolas Lazzarelli

Franklinite and Williamsite Optic Character

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

Similar to their colors, Franklinite and Williamsite 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.