Charoite and Xonotlite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous, Silky
Pleochroism
NilArthur Thomas
Not Available
Dispersion
Not Available
Not Available
Transparency
Translucent
Gems, Sixth Edition (2006)
Refractive Index
1.545-1.560
1.581-1.593
Optic Character
Not Available
Not Available
Crystal System
Triclinic
monoclinic
Birefringence
0.009
0.010
Charoite and Xonotlite Optic Character
Charoite and Xonotlite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Xonotlite 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 Xonotlite 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 Xonotlite Transparency
Similar to their colors, Charoite and Xonotlite 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.