Charoite and Erythrite Optical Properties
Luster
Pearly, Chatoyant
Subadamantine, Pearly
Pleochroism
-
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
Transparency
Translucent
-
Refractive Index
1.545-1.560
1.626-1.629
Crystal System
Triclinic
monoclinic
Birefringence
0.009
-9999
Charoite and Erythrite Optic Character
Charoite and Erythrite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Erythrite 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 Erythrite 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 Erythrite Transparency
Similar to their colors, Charoite and Erythrite 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.