Titanite and Nepheline Optical Properties

Titanite

Nepheline

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1 Optical Properties

1.1 Luster

Subadamantine, Resinous

Vitreous, Greasy

1.2 Pleochroism

Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent

1.5 Refractive Index

1.885-1.9901.529-1.547

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Hexagonal

1.8 Birefringence

0.105-0.1350.003-0.004

0 0.296

1.9 Clarity

Not Available

Transparent

Titanite and Nepheline Optic Character

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

Similar to their colors, Titanite and Nepheline 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, Titanite is Not Available while Titanite is Not Available in appearance.