Gold Poison ring in brass and turquoise.. What is a poison ring? Rings like this have been used throughout history to carry perfume, locks of hair, devotional relics, messages and other keepsakes, so they have also been known by other names. Artists would paint tiny portraits of loved ones, to be carried in what was called a “locket ring,” which was popular during the Renaissance. By the 17th century, jewelers were creating locket rings in the shape of caskets which served as mementos for mourners. These were called “funeral rings.” Rings with compartments are also called “box” rings or “socket” rings. High quality brass, 100% free from lead/ nickel. Ring sizes conversion FR-51 = US-6 FR-54 = US-7 FR-57 = US-8 FR-60 = US-9 FR-63 = US-10