Hibonite and Hibschite Optical Properties

Hibonite

Hibschite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

O = brownish gray; E = gray

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Handbook of mineralogy (2001)

Semitransparent

1.5 Refractive Index

1.79-1.807Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Handbook of mineralogy (2001)

TranslucentAnthony et al

Hibonite and Hibschite Optic Character

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

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