Riebeckite and Omphacite Optical Properties

Riebeckite

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Vitreous

1.2 Pleochroism

X = blue

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.680-1.6981.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.005-0.008Not Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Riebeckite and Omphacite Optic Character

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

Similar to their colors, Riebeckite and Omphacite 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, Riebeckite is Not Available while Riebeckite is Not Available in appearance.