The sterling silver ring boasts a captivating black onyx stone set in a genderless design that is easy to match and complement. Each Lore Van Keer piece is designed and hand-crafted in their atelier in Belgium. Material: Gold Plated Karat: 18K Stone: Onyx Stone Colour: Black Number of Stones: 1 Stone Shape: Rectangle Stone Setting Type: 4 prongs Available sizes: 52,54,56,58 Does it come with certificate? No Can the piece be engraved? No