Charoite and Chrysoberyl Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous
Pleochroism
NilArthur Thomas
X = red; Y = yellow-orange; Z = emerald-green
Transparency
Translucent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.545-1.560
1.746-1.763
Optic Character
Not Available
Biaxial/+
Crystal System
Triclinic
Orthorhombic
Birefringence
0.009
0.007-0.013
Clarity
Translucent
Transparent
Charoite and Chrysoberyl Optic Character
Charoite and Chrysoberyl optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Chrysoberyl 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 Chrysoberyl 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.
Charoite and Chrysoberyl Transparency
Similar to their colors, Charoite and Chrysoberyl 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.