These beautiful black onyx stud earrings are made of 18K White Gold Filled with (lab created) 9mm black onyx Topaz Zircon stones. Brand new and never been worn. Lead and nickel free. These fine quality earrings are perfect for everyday wear or a special gift. Get an $18 gift of your choice in my listings with purchase of two or more items. Please send offers and questions. Topaz Zircon Stone: 9mm or .35"x.35" Fastening: Butterfly Back (pierced)