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Topaz
Topaz

Inderite
Inderite



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Topaz
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Inderite

Topaz and Inderite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Pearly, Greasy

Pleochroism

Weak
-

Dispersion

0.01-
0.005 1
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Transparency

Transparent
-

Refractive Index

1.606-1.6441.488-1.505
1 3.25
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Optic Character

-
Biaxial/+

Crystal System

Orthorhombic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

0.008-0.0110.017
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Topaz and Inderite Optic Character

Topaz and Inderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Topaz and Inderite 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 Inderite 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. Inderite has Biaxial/+ character.

Topaz and Inderite Transparency

Similar to their colors, Topaz and Inderite 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.