Norbergite and Crocoite Optical Properties

Norbergite

Crocoite

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1 Optical Properties

1.1 Luster

Vitreous

Adamantine

1.2 Pleochroism

Pale yellow very pale yellow colorlessAnthony et al

Distinctly trichroic

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.563-1.5932.31-2.66

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Norbergite and Crocoite Optic Character

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

Similar to their colors, Norbergite and Crocoite 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, Norbergite is Transparent while Norbergite is Transparent in appearance.