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Crocoite
Crocoite

Danburite
Danburite



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Crocoite
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Danburite

Crocoite and Danburite Optical Properties

Optical Properties

Luster

Adamantine
Vitreous, Greasy

Pleochroism

Distinctly trichroic
Weak: pale yellow yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

2.31-2.661.627-1.639
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

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

Birefringence

-99990.006
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Crocoite and Danburite Optic Character

Crocoite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Crocoite and Danburite 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 Crocoite and Danburite 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. Danburite has Biaxial/+ character.

Crocoite and Danburite Transparency

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