Crocoite and Hibonite Optical Properties

Crocoite

Hibonite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Distinctly trichroic

O = brownish gray; E = gray

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Handbook of mineralogy (2001)

1.5 Refractive Index

2.31-2.661.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Handbook of mineralogy (2001)

Crocoite and Hibonite Optic Character

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

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