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Beudantite
Beudantite

Alexandrite
Alexandrite



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Beudantite
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Alexandrite

Beudantite and Alexandrite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

visible
-

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
Transparent, Transparent to nearly opaque

Refractive Index

1.9571.739-1.770
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

Trigonal
Orthorhombic

Birefringence

0.0140.007-0.010
0 0.296
👆🏻

Clarity

-
Transparent

Beudantite and Alexandrite Optic Character

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

Beudantite and Alexandrite Transparency

Similar to their colors, Beudantite 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, Beudantite is while Beudantite is in appearance.