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Pyrope
Pyrope

Tourmaline
Tourmaline



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Pyrope
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Tourmaline

Pyrope and Tourmaline Optical Properties

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Optical Properties

Luster

Greasy, Vitreous
Vitreous

Pleochroism

None
typically moderate to strong

Dispersion

0.020.02
0.005 1
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Transparency

-
Transparent, Translucent, Transparent to opaque

Refractive Index

1.720-1.7561.614-1.666
1 3.25
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Optic Character

-
-

Crystal System

cubic
Trigonal

Birefringence

-99990.014-0.040
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Pyrope and Tourmaline Optic Character

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

Similar to their colors, Pyrope and Tourmaline 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.