recycled 18kt white gold 18kt recycled white gold CO mono laboratory-grown diamond stud earring from Courbet featuring laboratory-grown diamonds, 0,65 gold weight and secure lock back. Please consider that this is sold as a single earring.. POSITIVELY CONSCIOUS: This Planet Conscious product is crafted from certified recycled or upcycled materials, which helps you make a better choice for the environment as they generate less energy, save water and reduce the need for new raw materials. For recycled synthetic clothing products we highly recommend using a microfibre-catching washing bag to ensure that no microplastics that can pollute water are released in the process..