Charoite and Agrellite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Pearly
Pleochroism
NilArthur Thomas
colorless.
Dispersion
Not Available
Not Available
Transparency
Translucent
Not Available
Refractive Index
1.545-1.560
1.567
Optic Character
Not Available
Not Available
Crystal System
Triclinic
Triclinic
Birefringence
0.009
0.014
Clarity
Translucent
Not Available
Charoite and Agrellite Optic Character
Charoite and Agrellite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Agrellite 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 Agrellite 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.
Charoite and Agrellite Transparency
Similar to their colors, Charoite and Agrellite 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.