Learn about alexandrite's durability and how to care for your alexandrite jewelry.

Alexandrite, with its chameleon-like qualities, is a rare variety of the mineral chrysoberyl. Its color can be a lovely green in daylight or fluorescent light, changing to brownish or purplish red in the incandescent light from a lamp or candle flame.

The gem was named after the young Alexander II, heir apparent to the throne. It caught the country’s attention because its red and green colors mirrored the Imperial Russian flag.

Learn about the factors that make alexandrite so desirable.

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.