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Cassiterite
Cassiterite

Atacamite
Atacamite



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Cassiterite
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Atacamite

Cassiterite and Atacamite Optical Properties

Optical Properties

Luster

Adamantine, Greasy
Adamantine, Vitreous

Pleochroism

Pleochroic haloes have been observed. Dichroic in yellow
X = pale green; Y = yellow-green; Z = grass-green

Dispersion

0.070.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.990-2.1051.831
1 3.25
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Optic Character

-
-

Crystal System

tetragonal
Orthorhombic

Birefringence

0.096-0.0980.049
0 0.296
👆🏻

Clarity

Transparent
-

Cassiterite and Atacamite Optic Character

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

Similar to their colors, Cassiterite and Atacamite 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.