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Cassiterite
Cassiterite

Crocoite
Crocoite



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Cassiterite
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Crocoite

Cassiterite and Crocoite Optical Properties

Optical Properties

Luster

Adamantine, Greasy
Adamantine

Pleochroism

Pleochroic haloes have been observed. Dichroic in yellow
Distinctly trichroic

Dispersion

0.070.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

1.990-2.1052.31-2.66
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.096-0.098-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Cassiterite and Crocoite Optic Character

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

Cassiterite and Crocoite Transparency

Similar to their colors, Cassiterite 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, Cassiterite is Transparent and Translucent while Cassiterite is Transparent and Translucent in appearance.