Omphacite and Hibonite Optical Properties

Omphacite

Hibonite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak: colorless -- very pale green -- very pale green

O = brownish gray; E = gray

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentAnthony et al, Handbook of mineralogy (2001)

Handbook of mineralogy (2001)

1.5 Refractive Index

1.662-1.7231.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentAnthony et al

Handbook of mineralogy (2001)

Omphacite and Hibonite Optic Character

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

Compare Green Gemstones

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Omphacite and Hibonite Transparency

Similar to their colors, Omphacite 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, Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al while Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al in appearance.