Nacre and Crocoite Optical Properties

Nacre

Crocoite

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1 Optical Properties

1.1 Luster

Not Available

Adamantine

1.2 Pleochroism

Not Available

Distinctly trichroic

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent

1.5 Refractive Index

Not Available2.31-2.66

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

Not Available

Transparent

Nacre and Crocoite Optic Character

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

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