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Cassiterite
Cassiterite

Gedrite
Gedrite



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Cassiterite
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Gedrite

Cassiterite and Gedrite Optical Properties

Optical Properties

Luster

Adamantine, Greasy
Vitreous

Pleochroism

Pleochroic haloes have been observed. Dichroic in yellow
Weak to moderate

Dispersion

0.070.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent

Refractive Index

1.990-2.1051.625-1.718
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Birefringence

0.096-0.098-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Cassiterite and Gedrite Optic Character

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

Similar to their colors, Cassiterite and Gedrite 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.