Charoite and Apophyllite Optical Properties
Luster
Pearly, Fibrous, Chatoyant
Vitreous, Pearly
Pleochroism
NilArthur Thomas
Dichroic (colorless)
Dispersion
Not Available
Not Available
Transparency
Translucent
Transparent, Translucent
Refractive Index
1.545-1.560
1.530-1.543
Optic Character
Not Available
Uniaxial/-
Crystal System
Triclinic
tetragonal
Birefringence
0.009
0.000-0.003
Clarity
Translucent
Transparent
Charoite and Apophyllite Optic Character
Charoite and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.
Charoite and Apophyllite Transparency
Similar to their colors, Charoite and Apophyllite 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.