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Chrysoberyl
Chrysoberyl

Allanite
Allanite



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Chrysoberyl
X
Allanite

Chrysoberyl and Allanite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
X = red; Y = yellow-orange; Z = emerald-green
Not Available
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Not Available
1.5 Refractive Index
1.746-1.7631
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.007-0.0130.013-0.036
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Chrysoberyl and Allanite Optic Character

Chrysoberyl and Allanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chrysoberyl 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 Chrysoberyl 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. Chrysoberyl has Biaxial/+ character.

Chrysoberyl and Allanite Transparency

Similar to their colors, Chrysoberyl 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, Chrysoberyl is Translucent, Transparent and Transparent to translucent while Chrysoberyl is Translucent, Transparent and Transparent to translucent in appearance.