A ruby eternity is a fiery and passionate show of your love on an anniversary. This ring is ideal for a gift idea for a 15th anniversary or for someone with a July birthday. 2.25 cttw in princess cut AA quality ruby gemstones are channel set into walls of the metal of your choice. The metal options we offer are platinum and 14kt or 18kt rose, white, or yellow colored gold. The band measures about 3.5 mm and has an incredibly delicate look to it.