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Lapis lazuli
Lapis lazuli

Pyrope
Pyrope



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Lapis lazuli
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Pyrope

Lapis lazuli and Pyrope Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Greasy, Vitreous

Pleochroism

-
None

Dispersion

-0.02
0.005 1
👆🏻

Transparency

Opaque
-

Refractive Index

1.500-1.6701.720-1.756
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
cubic

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Lapis lazuli and Pyrope Optic Character

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

Lapis lazuli and Pyrope Transparency

Similar to their colors, Lapis lazuli 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, Lapis lazuli is Opaque while Lapis lazuli is Opaque in appearance.