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Alexandrite
Alexandrite

Chromite
Chromite



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Alexandrite
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Chromite

Alexandrite and Chromite Optical Properties

Optical Properties

Luster

Vitreous
-

Pleochroism

-
none.

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent, Transparent to nearly opaque
-

Refractive Index

1.739-1.7702.08-2.16
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

Orthorhombic
Isometric

Birefringence

0.007-0.010-9999
0 0.296
👆🏻

Clarity

Transparent
-

Alexandrite and Chromite Optic Character

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

Similar to their colors, Alexandrite and Chromite 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.