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Charoite and Allanite Optical Properties


Allanite and Charoite Optical Properties


Optical Properties

Luster
Pearly, Fibrous, Chatoyant   
Not Available   

Pleochroism
NilArthur Thomas   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Not Available   

Refractive Index
1.545-1.560   
1   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Not Available   

Birefringence
0.009   
0.013-0.036   

Clarity
Translucent   
Not Available   

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<< Physical Properties

Charoite and Allanite Optic Character

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

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Charoite and Allanite Transparency

Similar to their colors, Charoite 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, Charoite is Translucent while Charoite is Translucent in appearance.

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