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Erythrite
Erythrite

Omphacite
Omphacite



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Erythrite
X
Omphacite

Erythrite and Omphacite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Subadamantine, Pearly
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
0.03
-
1.626-1.629
-
monoclinic
-9999
-
 
Vitreous
Weak: colorless -- very pale green -- very pale green
0.02
TranslucentAnthony et al
1.662-1.723
-
-
-9999
TranslucentAnthony et al

Erythrite and Omphacite Optic Character

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

Erythrite and Omphacite Transparency

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