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Fayalite
Fayalite

Pyrope
Pyrope



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Fayalite
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Pyrope

Fayalite and Pyrope Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Greasy, Vitreous

Pleochroism

Faint
None

Dispersion

0.030.02
0.005 1
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Transparency

TransparentAnthony et al
-

Refractive Index

1.827-1.8791.720-1.756
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
cubic

Birefringence

0.042-0.051-9999
0 0.296
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Clarity

TransparentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Fayalite and Pyrope Optic Character

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

Fayalite and Pyrope Transparency

Similar to their colors, Fayalite 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, Fayalite is TransparentAnthony et al while Fayalite is TransparentAnthony et al in appearance.