Erythrite and Hibonite Optical Properties

Erythrite

Hibonite

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1 Optical Properties

1.1 Luster

Subadamantine, Pearly

Vitreous

1.2 Pleochroism

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

O = brownish gray; E = gray

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Handbook of mineralogy (2001)

1.5 Refractive Index

1.626-1.6291.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

Handbook of mineralogy (2001)

Erythrite and Hibonite Optic Character

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

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