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Topaz
Topaz

Jasper
Jasper



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Topaz
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Jasper

Topaz and Jasper Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak
-

Dispersion

0.010.01
0.005 1
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Transparency

Transparent
Opaque

Refractive Index

1.606-1.6441.540
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.008-0.011-9999
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Topaz and Jasper Optic Character

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

Similar to their colors, Topaz and Jasper 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.