Charoite and Astrophyllite Optical Properties
Luster
Pearly, Chatoyant
Greasy, Pearly
Pleochroism
-
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Translucent
Translucent
Refractive Index
1.545-1.560
1.678-1.758
Crystal System
Triclinic
Triclinic
Birefringence
0.009
0.050
Clarity
Translucent
Translucent
Charoite and Astrophyllite Optic Character
Charoite and Astrophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Astrophyllite 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 Astrophyllite 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 Astrophyllite Transparency
Similar to their colors, Charoite and Astrophyllite 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.