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Topaz
Topaz

Taaffeite
Taaffeite



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Topaz
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Taaffeite

Topaz and Taaffeite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak
Weak

Dispersion

0.010.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.606-1.6441.70-1.73
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.008-0.0110.055
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Topaz and Taaffeite Optic Character

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

Similar to their colors, Topaz and Taaffeite 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.