Three Stone Opal Pyramid Piercing StudMaterial: Our 14k gold designs will not oxidize, discolor or tarnish and are designed to wear and enjoy everyday. Our diamond products feature stones of si clarity and g color. Description: The beauty of opal set in this simple and clean style is captured to create a modern classic. mix it up with other opal styles in the collection or keep it minimal. Screw back labrette setting is comfortable for lobe helix conch or tragus piercings 2mm opals 0. 5gm