From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a Aquamarine design, as well as create a vintage or antique look. A long time favorite of jewelry designers, aquamarine is the birthstone of March. The diamond-like brilliance of an aquamarine ring is sure to attract attention. Sapphire is the birthstone of September, and one of the most popular gemstones on the jewelry scene today. The deep blue color of a sapphire ring is just right for an evening out.