Charoite and Rosasite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Silky, Vitreous
Pleochroism
NilArthur Thomas
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue
Dispersion
Not Available
Not Available
Transparency
Translucent
Not Available
Refractive Index
1.545-1.560
1.672-1.688
Optic Character
Not Available
Not Available
Crystal System
Triclinic
monoclinic
Birefringence
0.009
0.139-0.143
Clarity
Translucent
Not Available
Charoite and Rosasite Optic Character
Charoite and Rosasite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Rosasite 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 Rosasite 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 Rosasite Transparency
Similar to their colors, Charoite and Rosasite 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.