Although aquamarine comes in many colors, including bluish-green and darker blue. The most prized color is a rich, clear, watery blue. Fairly large and clear, aquamarines with good color are among the more valuable semi-precious gems. They are often step cut, also known as emerald-cut, much like aquamarine's mineral sister, emerald. Good clarity is important in these stones, especially lighter ones where flaws will be more visible. Brazil is the primary source of aquamarine, although it is mined in other places as well. The most common enhancement is heat-treating.
Aquamarine has long been a positive stone according to legend, bringing with it health, hopefulness and youth. It was traditionally a favorite of sailors, and is said to be a good choice for anyone who loves the sea. It could also bring love and affection. Its supernatural powers were remarkable; legend has it that a person with an aquamarine in his or her mouth could summon the devil and get questions answered.
Aquamarine is March's birthstone. It is a variety of beryl, like emerald, and its color comes from iron. It is a very durable stone, with a Mohs hardness rating of 8.