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Realgar
Realgar

Allanite
Allanite



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Realgar
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Allanite

Realgar and Allanite Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
Nearly colorless to pale golden yellowAnthony et al
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gems
Not Available
1.5 Refractive Index
2.538-2.7041
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
0.1660.013-0.036
Achroite
0 0.296
1.9 Clarity
Gems
Not Available

Realgar and Allanite Optic Character

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

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