Charoite and Andesine Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous
Pleochroism
NilArthur Thomas
colorless.
Transparency
Translucent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.545-1.560
1.543-1.564
Optic Character
Not Available
Biaxial/+
Crystal System
Triclinic
Triclinic
Birefringence
0.009
0.007-0.011
Clarity
Translucent
Transparent
Charoite and Andesine Optic Character
Charoite and Andesine optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Andesine 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 Andesine 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. Andesine has Biaxial/+ character.
Charoite and Andesine Transparency
Similar to their colors, Charoite and Andesine 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.