Charoite and Danburite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous, Greasy
Pleochroism
NilArthur Thomas
Weak: pale yellow yellow
Transparency
Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.545-1.560
1.627-1.639
Optic Character
Not Available
Biaxial/+
Crystal System
Triclinic
Orthorhombic
Birefringence
0.009
0.006
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Charoite and Danburite Optic Character
Charoite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Danburite 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 Danburite 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. Danburite has Biaxial/+ character.
Charoite and Danburite Transparency
Similar to their colors, Charoite and Danburite 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.