Aquamarine is the birthstone for the month of March. This beautiful gemstone is usually a light to deep blue-green color and is associated with the calming powers of the sea. It is believed to bring clarity of thought and inner peace, as well as protection from harm. Aquamarine is also thought to bring good luck and harmony to relationships. This gemstone is perfect for anyone looking to bring a little extra luck and peace into their life. From deep green-blue to light to slightly greenish-blue hues, aquamarine birthstone evokes the colors of the sea.