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Forsterite
Forsterite

Pyrope
Pyrope



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Forsterite
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Pyrope

Forsterite and Pyrope Optical Properties

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Optical Properties

Luster

Vitreous
Greasy, Vitreous

Pleochroism

colorless.
None

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.635-1.6711.720-1.756
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
cubic

Birefringence

0.033-0.042-9999
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Forsterite and Pyrope Optic Character

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

Forsterite and Pyrope Transparency

Similar to their colors, Forsterite 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, Forsterite is Transparent while Forsterite is Transparent in appearance.