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. Pink tourmaline is a birthstone of October, along with opal, and is a truly special gem. The deep rosy color of a pink tourmaline ring will be sure to attract attention.