Charoite and Ludlamite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous, Pearly
Pleochroism
NilArthur Thomas
NilArthur Thomas
Dispersion
Not Available
Not Available
Transparency
Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.545-1.560
1.653-1.693
Optic Character
Not Available
Not Available
Crystal System
Triclinic
monoclinic
Birefringence
0.009
0.038-0.044
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Charoite and Ludlamite Optic Character
Charoite and Ludlamite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Ludlamite 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 Ludlamite 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 Ludlamite Transparency
Similar to their colors, Charoite and Ludlamite 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.