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Zircon
Zircon

Alexandrite
Alexandrite



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Zircon
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Alexandrite

Zircon and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Vitreous
1.2 Pleochroism
Weak
Not Available
1.3 Dispersion
0.04NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent, Transparent to nearly opaque
1.5 Refractive Index
1.810-2.0241.739-1.770
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
tetragonal
Orthorhombic
1.8 Birefringence
0.047-0.0550.007-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Zircon and Alexandrite Optic Character

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

Zircon and Alexandrite Transparency

Similar to their colors, Zircon 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, Zircon is Transparent while Zircon is Transparent in appearance.