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Alexandrite
Alexandrite

Nepouite
Nepouite



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Alexandrite
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Nepouite

Alexandrite and Nepouite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Waxy, Pearly
1.2 Pleochroism
Not Available
Weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to nearly opaque
Not Available
1.5 Refractive Index
1.739-1.7701.600-1.630
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.007-0.010Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Alexandrite and Nepouite Optic Character

Alexandrite and Nepouite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Alexandrite and Nepouite 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 Alexandrite and Nepouite 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.

Alexandrite and Nepouite Transparency

Similar to their colors, Alexandrite and Nepouite 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, Alexandrite is Transparent and Transparent to nearly opaque while Alexandrite is Transparent and Transparent to nearly opaque in appearance.