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Omphacite
Omphacite

Franklinite
Franklinite



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Omphacite
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Franklinite

Omphacite and Franklinite Optical Properties

Optical Properties

Luster

Vitreous
-

Pleochroism

Weak: colorless -- very pale green -- very pale green
-

Dispersion

0.020.19
0.005 1
👆🏻

Transparency

TranslucentAnthony et al
Translucent

Refractive Index

1.662-1.723-9999
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

TranslucentAnthony et al
Translucent

Omphacite and Franklinite Optic Character

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

Omphacite and Franklinite Transparency

Similar to their colors, Omphacite and Franklinite 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, Omphacite is TranslucentAnthony et al while Omphacite is TranslucentAnthony et al in appearance.