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Alunite
Alunite

Pyrope
Pyrope



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Alunite
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Pyrope

Alunite and Pyrope Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Greasy, Vitreous

Pleochroism

-
None

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.5721.720-1.756
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
cubic

Birefringence

0.020-9999
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Alunite and Pyrope Optic Character

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

Alunite and Pyrope Transparency

Similar to their colors, Alunite 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, Alunite is while Alunite is in appearance.