Charoite and Fire Opal Optical Properties
Luster
Pearly, Chatoyant
-
Transparency
Translucent
Transparent, Translucent
Refractive Index
1.545-1.560
1.370-1.470
Crystal System
Triclinic
-
Birefringence
0.009
-9999
Clarity
Translucent
Transparent
Charoite and Fire Opal Optic Character
Charoite and Fire Opal optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Fire Opal 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 Fire Opal 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 Fire Opal Transparency
Similar to their colors, Charoite and Fire Opal 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.