Charoite and Painite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Not Available
Pleochroism
NilArthur Thomas
Strong dichroism: yellow-brown red to brown-violet (pinkish samples: nearly colorless pale orangy-pink)Herve Nicolas Lazzarelli
Dispersion
Not Available
Not Available
Transparency
Translucent
Gems
Refractive Index
1.545-1.560
1.787-1.816
Optic Character
Not Available
Not Available
Crystal System
Triclinic
Not Available
Birefringence
0.009
0.029
Charoite and Painite Optic Character
Charoite and Painite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Painite 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 Painite 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 Painite Transparency
Similar to their colors, Charoite and Painite 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.