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Pyrope
Pyrope

Lapis lazuli
Lapis lazuli



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Pyrope
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Lapis lazuli

Pyrope and Lapis lazuli Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Greasy

Pleochroism

None
-

Dispersion

0.02-
0.005 1
👆🏻

Transparency

-
Opaque

Refractive Index

1.720-1.7561.500-1.670
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
Trigonal

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
-

Pyrope and Lapis lazuli Optic Character

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

Similar to their colors, Pyrope and Lapis lazuli 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.