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Taaffeite
Taaffeite

Cassiterite
Cassiterite



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Taaffeite
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Cassiterite

Taaffeite and Cassiterite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine, Greasy

Pleochroism

Weak
Pleochroic haloes have been observed. Dichroic in yellow

Dispersion

0.020.07
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

1.70-1.731.990-2.105
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
tetragonal

Birefringence

0.0550.096-0.098
0 0.296
👆🏻

Clarity

-
Transparent

Taaffeite and Cassiterite Optic Character

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

Taaffeite and Cassiterite Transparency

Similar to their colors, Taaffeite 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, Taaffeite is while Taaffeite is in appearance.