Aquamarine is the birthstone for the month of March. The seawater color of aquamarine has given this gemstone its name as the name “aquamarine” is derived from the Latin word for seawater. The Greeks and the Romans knew the aquamarine as the sailor’s gem, ensuring the safe and prosperous passage across stormy seas. In Medieval times, the stone was thought to reawaken the love of married couples. It was also believed to render soldiers invincible.