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Turquoise
Turquoise

Topaz
Topaz



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Turquoise
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Topaz

Turquoise and Topaz Optical Properties

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Optical Properties

Luster

Waxy
Vitreous

Pleochroism

Weak
Weak

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Translucent, Opaque
Transparent

Refractive Index

1.610-1.6501.606-1.644
1 3.25
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Optic Character

-
-

Crystal System

Triclinic
Orthorhombic

Birefringence

0.0400.008-0.011
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Turquoise and Topaz Optic Character

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

Turquoise and Topaz Transparency

Similar to their colors, Turquoise and Topaz 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, Turquoise is Translucent and Opaque while Turquoise is Translucent and Opaque in appearance.