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Nacre
Nacre

Variscite
Variscite



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Nacre
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Variscite

Nacre and Variscite Optical Properties

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Optical Properties

Luster

-
Vitreous, Waxy

Pleochroism

-
-

Dispersion

0.190.01
0.005 1
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Transparency

-
Translucent, Opaque . May be translucent when backlit on the edges.

Refractive Index

-99991.560-1.594
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.031
0 0.296
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Clarity

-
Translucent

Nacre and Variscite Optic Character

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

Nacre and Variscite Transparency

Similar to their colors, Nacre and Variscite 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, Nacre is while Nacre is in appearance.