Aquamarine is a variety of the mineral Beryl (Beryllium Aluminum Silicate) and is used as a gemstone. The name aquamarine comes from the Latin words "aqua marina", or "water of the sea", which describes its transparent blue or blue-green color. The emerald is also a variety of the mineral Beryl.
The gems have been largely mined in Russia and Brazil and are also found in China, India, Australia, Madagascar, Sri Lanka, and parts of Africa. In the United States they have been found in North Carolina, Maine, New Hampshire, Connecticut, and Colorado, and on April 30, 1971, was adopted as the official state gemstone of Colorado. Aquamarine is the birthstone for March.