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Erythrite
Erythrite

Pyrope
Pyrope



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Erythrite
X
Pyrope

Erythrite and Pyrope Optical Properties

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Optical Properties

Luster

Subadamantine, Pearly
Greasy, Vitreous

Pleochroism

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
None

Dispersion

0.030.02
0.005 1
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Transparency

-
-

Refractive Index

1.626-1.6291.720-1.756
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
cubic

Birefringence

-9999-9999
0 0.296
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Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Erythrite and Pyrope Optic Character

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

Similar to their colors, Erythrite and Pyrope 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.