Atacamite and Omphacite Optical Properties

Atacamite

Omphacite

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1 Optical Properties

1.1 Luster

Adamantine, Vitreous

Vitreous

1.2 Pleochroism

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

Weak: colorless -- very pale green -- very pale green

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.8311.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.049Not Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Atacamite and Omphacite Optic Character

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

Similar to their colors, Atacamite and Omphacite 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.