From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a Fire Opal design, as well as create a vintage or antique look. This birthstone of October embodies the orange and red colors of a warming fire. The fiery sparkle of this gem makes a fire opal ring become the center of conversation Tanzanite is the new birthstone of December and has a unique purple-blue color. A tanzanite ring is one of the newest fashion trends and is a must for any jewelry collection.