Aquamarine is a gemstone that comes in mainly two colors, blue and blue-green. Aquamarine is named after seawater because of it's watery hue. This gemstone can be found in many places around the world where mountains are. Aquamarine is the birthstone for the month of March. Aquamarine is said to bring mental clarity and focus to it's wearer as well as cleansing the aura of negative energy.