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Zircon
Zircon

Spinel
Spinel



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Zircon
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Spinel

Zircon and Spinel Optical Properties

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Optical Properties

Luster

Adamantine
Vitreous

Pleochroism

Weak
Absent

Dispersion

0.040.02
0.005 1
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Transparency

Transparent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.810-2.0241.73
1 3.25
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Optic Character

-
-

Crystal System

tetragonal
Isometric

Birefringence

0.047-0.055-9999
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Zircon and Spinel Optic Character

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

Zircon and Spinel Transparency

Similar to their colors, Zircon and Spinel 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, Zircon is Transparent while Zircon is Transparent in appearance.