Atacamite and Erythrite Optical Properties

Atacamite

Erythrite

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1 Optical Properties

1.1 Luster

Adamantine, Vitreous

Subadamantine, Pearly

1.2 Pleochroism

X = pale green; Y = yellow-green; Z = grass-green

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

1.5 Refractive Index

1.8311.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.049Not Available

0 0.296

1.9 Clarity

Not Available

Atacamite and Erythrite Optic Character

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

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Atacamite and Erythrite Transparency

Similar to their colors, Atacamite and Erythrite 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 Not Available while Atacamite is Not Available in appearance.