Nickeline and Omphacite Optical Properties

Nickeline

Omphacite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Strong (reflected light)

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

Not Available1.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Nickeline and Omphacite Optic Character

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

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