Color Change Russian Alexandrite Ring, 1.37 Carats

The 1.37-carat alexandrite set in this ring represents one of the rarest varieties of color-changing gemstones. The chameleon-like qualities of the stone stem from the complex way in which it absorbs certain types of light. Viewed in the daylight or under fluorescent light, the alexandrite displays a blue-green hue, while incandescent light changes its color to a rich burgundy. The phenomenon has led many to describe this rare gem as "an emerald by day, a ruby by night." The remarkable alexandrite is accented by diamonds totaling 0.50 carats and set in platinum.

Apart from its remarkable color-changing abilities, the alexandrite also enjoys an illustrious history. According to legend, it was discovered in 1834 on the day that the future Russian Tsar Alexander II came of age, and thus it was named "Alexandrite" in his honor. Because the stone's color shifts from green to red — the national colors of Imperial Russia — the alexandrite also became the country’s official gemstone.