Chrysoprase and Phosgenite Optical Properties

Chrysoprase

Phosgenite

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Optical Properties

Luster

Vitreous, Waxy

Adamantine

Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.010.04

0.005 1

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Transparency

Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.530-1.5432.117-2.145

1 3.25

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Optic Character

Crystal System

Trigonal

tetragonal

Birefringence

0.0040.027

0 0.296

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Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Chrysoprase and Phosgenite Optic Character

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

Similar to their colors, Chrysoprase and Phosgenite 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.