The cage stud encases the stone rather than simply setting it - the metal framework wrapping around the CZ from multiple angles, creating a three-dimensional sculptural form at the ear. Rachel Zoe's version in rhodium over sterling silver uses rows of round CZ within the cage structure, so the sparkle is both contained and visible through the framework. Butterfly back closure. The cage format is the design evolution from the standard bezel - it surrounds the stone with more metal presence while maintaining the architectural restraint that makes bezel settings appealing in the first place. A stud earring with genuine structural complexity.