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Pyrope
Pyrope

Feldspar
Feldspar



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Pyrope
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Feldspar

Pyrope and Feldspar Optical Properties

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Optical Properties

Luster

Greasy, Vitreous
Vitreous

Pleochroism

None
None

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

1.720-1.7561.518-1.570
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
Triclinic or monoclinic

Birefringence

-99990.008-0.010
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Pyrope and Feldspar Optic Character

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

Similar to their colors, Pyrope and Feldspar 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.