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Alexandrite Overview

Omi Prive
Omi Privé

A relatively modern gem, alexandrite was discovered in Russian emerald mines located in the Ural Mountains. Legends claim that it was discovered in 1834 on the same day that future Russian Czar Alexander II came of age, hence the name honoring him. Because this unique gemstone changed colors from green to red—the national colors of Russia—alexandrite became Imperial Russia’s official gemstone.

Often described as “emerald by day, ruby by night,” alexandrite is a rare variety of the mineral chrysoberyl that changes color from bluish green in daylight to purplish red under incandescent light.

AG Gems
AG Gems

This chameleon-like behavior is the result of its uncommon chemical composition— which includes traces of chromium, the same coloring agent found in emerald. The unlikelihood of these elements combining under the right conditions makes alexandrite one of the rarest, costliest gems.

The alexandrite mined from Russia’s famed deposits set the quality standard for this stone. Today, most alexandrite comes from Sri Lanka, Brazil and East Africa—generally paling in comparison to the vivid colors of Russian gems.

With a hardness of 8.5 on the Mohs scale, alexandrite is softer than sapphire and harder than garnet—the other gemstones that can change color. However, due to its scarcity, alexandrite is more valuable than most gems, even rubies and diamonds.

Associated with concentration and learning, alexandrite is believed to strengthen intuition, aid creativity and inspire imagination—bringing good omens to anyone who wears it.

Learn more about the history of alexandrite or how to buy this rare gem.