18kt recycled yellow gold 18kt recycled yellow gold Celeste laboratory-grown diamond small pendant necklace from Courbet featuring lobster claw fastening, adjustable-length chain, delicate chain, laboratory-grown diamonds and gold weight 3g. 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..