Aquamarine BirthstoneAquamarine Birthstone Meaning & HistoryAquamarine’s name comes from the Latin for seawater, and ancient mariners claimed the gem would calm waves and keep sailors safe at sea. This March birthstone was also thought to bring happiness in marriage. Beryl was believed to give the wearer protection against foes in battle and litigation. It was also thought to make the wearer unconquerable and amiable, and to quicken the intellect. Aquamarine is not only the birthstone for March, but the gem is also given as a present on the 19th wedding anniversary. As for famous ones, in 1936 the government of Brazil gave First Lady Eleanor Roosevelt a dark blue rectangular step cut aquamarine that weighed 1,298 carats (ct). It was the larger of two stones faceted from a piece of aquamarine rough that itself weighed an impressive 2.9 pounds (1.3 kilograms). It is now housed at the Franklin D. Roosevelt Presidential Library and Museum in Hyde Park, New York. A celebrated attraction at the Smithsonian Institution is the 10,363 ct (about 4.6 pounds) Dom Pedro Aquamarine – believed to be the largest faceted aquamarine in the world. The approximately 14 inch (36 centimeter) high obelisk was fashioned by acclaimed German lapidary Berndt Munsteiner using the fantasy cut technique.