Alexandrite Jewelry Guide: The Color-Changing Gemstone

Alexandrite is one of the rarest and most fascinating gemstones on Earth. Known for its remarkable color-changing ability, alexandrite appears green in daylight and shifts to reddish-purple under incandescent light. This chameleon-like quality makes it one of the most prized gems in the world.

The Science Behind the Color Change

Alexandrite belongs to the chrysoberyl family. Trace amounts of chromium in its crystal structure absorb specific wavelengths of light differently depending on the light source. In daylight (rich in blue wavelengths), it appears green to bluish-green. Under incandescent light (rich in red wavelengths), it shifts to purplish-red or raspberry.

Alexandrite Facts

Hardness: 8.5 on the Mohs scale — excellent for everyday jewelry
Birthstone: June (shared with pearl and moonstone)
Origin: First discovered in Russia in the 1830s, now also found in Brazil, Sri Lanka, and East Africa
Rarity: Natural alexandrite with strong color change is rarer than diamond

Lab-Created Alexandrite

Due to extreme rarity and cost of natural alexandrite, lab-created versions offer the same stunning color change at accessible prices. Lab alexandrite has identical chemical composition and optical properties to natural stones, making it an excellent choice for beautiful jewelry without the premium.

Best Settings for Alexandrite

White gold and sterling silver enhance alexandrite's green phase beautifully. Yellow gold complements its warm reddish phase. Rose gold creates an interesting interplay with both color phases.

Alexandrite in Jewelry

Rings showcase the color change most dramatically as your hand moves through different lighting. Pendants allow the stone to catch changing light beautifully. Earrings near the face create a magical effect as light varies.

Caring for Alexandrite

With hardness 8.5, alexandrite is very durable. Clean with warm soapy water and a soft cloth. Ultrasonic cleaners are generally safe. For comprehensive care advice, read our gemstone care guide.