Charoite and Amblygonite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous, Pearly
Pleochroism
NilArthur Thomas
weak to none
Transparency
Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.545-1.560
1.578-1.646
Optic Character
Not Available
Biaxial/+
Crystal System
Triclinic
Triclinic
Birefringence
0.009
0.020-0.030
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Charoite and Amblygonite Optic Character
Charoite and Amblygonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Amblygonite 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 Amblygonite 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. Amblygonite has Biaxial/+ character.
Charoite and Amblygonite Transparency
Similar to their colors, Charoite and Amblygonite 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.