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Realgar
Realgar

Chalcedony
Chalcedony



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Realgar
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Chalcedony

Realgar and Chalcedony Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

Nearly colorless to pale golden yellowAnthony et al
-

Dispersion

0.060.01
0.005 1
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Transparency

-
Translucent, Translucent to opaque

Refractive Index

2.538-2.7041.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.1660.003-0.009
0 0.296
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Clarity

-
Translucent

Realgar and Chalcedony Optic Character

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

Realgar and Chalcedony Transparency

Similar to their colors, Realgar and Chalcedony 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, Realgar is while Realgar is in appearance.