Atacamite and Manganotantalite Optical Properties

Atacamite

Manganotantalite

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1 Optical Properties

1.1 Luster

Adamantine, Vitreous

Not Available

1.2 Pleochroism

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

Sometimes strongArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.8312.19-2.34

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.0490.015

0 0.296

1.9 Clarity

Not Available

TransparentWalter Schumann

Atacamite and Manganotantalite Optic Character

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

Similar to their colors, Atacamite and Manganotantalite 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.