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Pyrope
Pyrope

Umbalite
Umbalite



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Pyrope
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Umbalite

Pyrope and Umbalite Optical Properties

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Optical Properties

Luster

Greasy, Vitreous
-

Pleochroism

None
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
TransparentGemdat.org

Refractive Index

1.720-1.7561.730-1.820
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
-

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentGemdat.org

Pyrope and Umbalite Optic Character

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

Pyrope and Umbalite Transparency

Similar to their colors, Pyrope and Umbalite 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, Pyrope is while Pyrope is in appearance.