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Atacamite
Atacamite

Dravite
Dravite



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Atacamite
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Dravite

Atacamite and Dravite Optical Properties

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Optical Properties

Luster

Adamantine, Vitreous
Vitreous

Pleochroism

X = pale green; Y = yellow-green; Z = grass-green
Very strong: pale yellow colorless

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.8311.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

Birefringence

0.0490.014-0.032
0 0.296
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Clarity

-
Transparent

Atacamite and Dravite Optic Character

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

Similar to their colors, Atacamite and Dravite 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.