Chrysoprase and Nepheline Optical Properties

Chrysoprase

Nepheline

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1 Optical Properties

1.1 Luster

Vitreous, Vitreous, Waxy

Vitreous, Greasy

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Translucent, Opaque, Translucent to nearly opaque

Transparent, Translucent

1.5 Refractive Index

1.530-1.5431.529-1.547

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Hexagonal

1.8 Birefringence

0.0040.003-0.004

0 0.296

1.9 Clarity

Translucent

Transparent

Chrysoprase and Nepheline Optic Character

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

Similar to their colors, Chrysoprase 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, Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque while Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque in appearance.