Charoite and Adamite Optical Properties
Luster
Pearly, Chatoyant
Vitreous
Transparency
Translucent
Transparent
Refractive Index
1.545-1.560
1.708-1.722
Optic Character
-
Biaxial/+
Crystal System
Triclinic
Orthorhombic
Birefringence
0.009
0.031-0.050
Clarity
Translucent
Transparent
Charoite and Adamite Optic Character
Charoite and Adamite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Adamite 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 Adamite 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. Adamite has Biaxial/+ character.
Charoite and Adamite Transparency
Similar to their colors, Charoite and Adamite 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.