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Benitoite
Benitoite

Crocoite
Crocoite



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Benitoite
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Crocoite

Benitoite and Crocoite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

O = colorless; E = purple
Distinctly trichroic

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

Transparent
Transparent

Refractive Index

1.757-1.8042.31-2.66
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

Birefringence

0.047-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Benitoite and Crocoite Optic Character

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

Benitoite and Crocoite Transparency

Similar to their colors, Benitoite and Crocoite 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, Benitoite is Transparent while Benitoite is Transparent in appearance.