Aquamarine gemstone and star pendant necklace14. 5" long, 2" chain, 16. 5" total length genuine aquamarine and brass, no lead, no nickel in the metal Aquamarine is the second most popular gem beryl and is the birthstone for the month of March. Like emerald, its identity is defined by its color. Aquamarine has a distinct greenish blue to blue color. Unlike emerald, light colored stones in this color range are still called aquamarine. The stones that are richly colored are the most desirable, and