Adding a little charm to your daily aesthetic. These studded threaders have an oblong drop of bright blue fire opal set to anchor a sweeping thread of chain. Opal is known as the "joy" stone, intensifying happiness and encouraging freedom of emotions. Tarnish Free - Long lasting protective coating safeguarding your jewelry from sweat, water, and more. Sterling Silver Posts – 18K gold plating over brass Hypoallergenic – Lead Free Oval Lab Grown Fire Opal Stone No backing is required, silicone stopper included