Morganite and Alexandrite Optical Properties

Morganite

Alexandrite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Distinct: pale pink bluish-pinkHerve Nicolas Lazzarelli

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent, Transparent to nearly opaque

1.5 Refractive Index

1.573-1.6001.739-1.770

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Hexagonal

Orthorhombic

1.8 Birefringence

0.005-0.0090.007-0.010

0 0.296

1.9 Clarity

Transparent to translucent

Transparent

Morganite and Alexandrite Optic Character

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

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Morganite and Alexandrite Transparency

Similar to their colors, Morganite 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, Morganite is Translucent, Transparent and Transparent to translucent while Morganite is Translucent, Transparent and Transparent to translucent in appearance.