Chrysoprase and Tanzanite Optical Properties

Chrysoprase

Tanzanite

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Optical Properties

Luster

Vitreous, Waxy

Vitreous

Pleochroism

Present

Dispersion

0.010.03

0.005 1

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Transparency

Translucent, Opaque, Translucent to nearly opaque

Transparent, Translucent, Transparent to translucent

Refractive Index

1.530-1.5431.685-1.707

1 3.25

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Optic Character

Crystal System

Trigonal

Orthorhombic

Birefringence

0.0040.006-0.018

0 0.296

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Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Chrysoprase and Tanzanite Optic Character

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

Similar to their colors, Chrysoprase and Tanzanite 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.