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Topaz
Topaz

Chrysoprase
Chrysoprase



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Topaz
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Chrysoprase

Topaz and Chrysoprase Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Waxy

Pleochroism

Weak
-

Dispersion

0.010.01
0.005 1
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Transparency

Transparent
Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.606-1.6441.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.008-0.0110.004
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Topaz and Chrysoprase Optic Character

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

Topaz and Chrysoprase Transparency

Similar to their colors, Topaz and Chrysoprase 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, Topaz is Transparent while Topaz is Transparent in appearance.