Charoite and Sard Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Waxy
Pleochroism
NilArthur Thomas
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Translucent
Translucent
Refractive Index
1.545-1.560
1.535-1.539
Optic Character
Not Available
Not Available
Crystal System
Triclinic
Not Available
Birefringence
0.009
0.008-0.010
Clarity
Translucent
Translucent
Charoite and Sard Optic Character
Charoite and Sard optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Sard 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 Sard 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 Sard Transparency
Similar to their colors, Charoite and Sard 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.
