Chalcopyrite and Brazilianite Optical Properties

Chalcopyrite

Brazilianite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

Very weakWalter Schumann

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

Gemmological Tables (2004) More from other references

1.5 Refractive Index

Not Available1.602-1.625

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

monoclinic

1.8 Birefringence

Not Available0.019-0.021

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

TransparentUlrich Henn and Claudio C. Milisenda

Chalcopyrite and Brazilianite Optic Character

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

Similar to their colors, Chalcopyrite and Brazilianite 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, Chalcopyrite is Handbook of mineralogy (2001) while Chalcopyrite is Handbook of mineralogy (2001) in appearance.