For more than 4,000 years, the deep “green fire” of emeralds has been treasured as a symbol of eternal spring and immortality. The birthstone for May isn’t just a beautiful gem: emeralds are also ornaments of power and politics that have created legends and molded world history.

Emeralds occur in various shades of green, slightly bluish-green, and even very slightly yellowish-green, including the famous grassy "emerald" green.