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Atacamite
Atacamite

Cassiterite
Cassiterite



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Atacamite
X
Cassiterite

Atacamite and Cassiterite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous
Adamantine, Greasy

Pleochroism

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

Dispersion

0.030.07
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

1.8311.990-2.105
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
tetragonal

Birefringence

0.0490.096-0.098
0 0.296
👆🏻

Clarity

-
Transparent

Atacamite and Cassiterite Optic Character

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

Atacamite and Cassiterite Transparency

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