Aquamarine is a blue-green mineral found in metamorphic rocks. It is most commonly used in jewelry, but can also be used as a gemstone in other applications. Aquamarine is a relatively hard mineral, with a Mohs hardness of 7.5-8.0. It has good cleavage and a vitreous luster. Aquamarine is found in a variety of colors, from pale blue to greenish-blue. The most prized aquamarine stones are those with a deep blue color. Aquamarine is the birthstone for the month of March, and is also the traditional gift for the 19th anniversary. Aquamarine jewelry is popular for both men and women, and can be found in rings, earrings, necklaces, and other pieces. Aquamarine is a durable stone that can withstand daily wear, making it an ideal choice for everyday jewelry.