Cacoxenite and Manganotantalite Optical Properties

Cacoxenite

Manganotantalite

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1 Optical Properties

1.1 Luster

Silky

Not Available

1.2 Pleochroism

visible: O = Pale yellow E = Canary yellow to yellow orange

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

1.575-1.5852.19-2.34

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Not Available

1.8 Birefringence

Not Available0.015

0 0.296

1.9 Clarity

Not Available

TransparentWalter Schumann

Cacoxenite and Manganotantalite Optic Character

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

Similar to their colors, Cacoxenite 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, Cacoxenite is Not Available while Cacoxenite is Not Available in appearance.