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Omphacite
Omphacite

Phenakite
Phenakite



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Omphacite
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Phenakite

Omphacite and Phenakite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Weak: colorless -- very pale green -- very pale green
0.02
TranslucentAnthony et al
1.662-1.723
-
-
-9999
TranslucentAnthony et al
 
Vitreous
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli
0.02
-
1.650-1.695
-
Trigonal
0.016
TransparentUlrich Henn and Claudio C. Milisenda

Omphacite and Phenakite Optic Character

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

Similar to their colors, Omphacite and Phenakite 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 while Omphacite is in appearance.