Other birthstones include agate, which also comes in green colors. Today, emerald is known as the birthstone for the month of may and is used in engagement rings and other jewelry. Oval Facet Green Emerald From Zambia Green Gems Birthstones Gemstone Colors The rich green of its emerald birthstone is symbolic of the flowering of the world. What color is emerald birthstone . The rebirth that begins in april reaches its fullest flowering in may. Connected heavily to venus in ancient roman times, love, beauty, and wisdom are heavily connected with this stone and those born in this month. Zambian emeralds receive their color from iron. Most want an emerald that is close to green or blue as that is what they’re most known to look like but the truth of the matter is that the most valuable emerald is one that is actually transparent. Emerald is a gemstone and a variety of the mineral beryl (be 3 al 2 (sio 3) 6) colored green by trace amounts of chromium and/or sometimes vanadium.