Chrysoprase and Sphene Optical Properties

Chrysoprase

Sphene

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Optical Properties

Luster

Vitreous, Waxy

Pleochroism

Dispersion

0.010.05

0.005 1

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Transparency

Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.530-1.5431.84-2.11

1 3.25

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Optic Character

Crystal System

Trigonal

monoclinic

Birefringence

0.004-9999

0 0.296

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Clarity

Translucent

Chrysoprase and Sphene Optic Character

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

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