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Crocoite
Crocoite

Sinhalite
Sinhalite



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Crocoite
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Sinhalite

Crocoite and Sinhalite Optical Properties

Optical Properties

Luster

Adamantine
-

Pleochroism

Distinctly trichroic
Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

2.31-2.661.665-1.712
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.036-0.042
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Crocoite and Sinhalite Optic Character

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

Crocoite and Sinhalite Transparency

Similar to their colors, Crocoite and Sinhalite 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.