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Elbaite
Elbaite

Cassiterite
Cassiterite



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Elbaite
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Cassiterite

Elbaite and Cassiterite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine, Greasy

Pleochroism

Pale green
Pleochroic haloes have been observed. Dichroic in yellow

Dispersion

0.020.07
0.005 1
👆🏻

Transparency

Transparent
Transparent, Translucent

Refractive Index

1.614-1.6661.990-2.105
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
tetragonal

Birefringence

0.014-0.0320.096-0.098
0 0.296
👆🏻

Clarity

Transparent
Transparent

Elbaite and Cassiterite Optic Character

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

Elbaite and Cassiterite Transparency

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