Weighing 12.64 carats, this spectacular Aquamarine, cut as an octagon has great internal brilliance. Measuring up to 20.57 x 9.38 x 7.52 mm, this piece could be the statement of any pendant or cocktail ring. With a delicate and even sky blue color, this gemstone shares the same chemical composition as an emerald, except for its body color. Generally known for its eye clean stones, Aquamarines make a great choice for everyday jewelry.