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Charoite
Charoite

Alexandrite
Alexandrite



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Charoite
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Alexandrite

Charoite and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Fibrous, Chatoyant
Vitreous
1.2 Pleochroism
NilArthur Thomas
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent, Transparent to nearly opaque
1.5 Refractive Index
1.545-1.5601.739-1.770
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Triclinic
Orthorhombic
1.8 Birefringence
0.0090.007-0.010
Achroite
0 0.296
1.9 Clarity
Translucent
Transparent

Charoite and Alexandrite Optic Character

Charoite and Alexandrite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Charoite and Alexandrite 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 Alexandrite 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. Alexandrite has Biaxial/+ character.

Charoite and Alexandrite Transparency

Similar to their colors, Charoite and Alexandrite 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.