TOUS Good Vibes earrings set in silver vermeil (horseshoe and lucky) and dark silver (bear). Earrings sizes: 0.6 – 1 cm. Push back. Sterling silver plated with 18kt gold with a thickness of 3 to 5 microns and with no other metal between them. (Dark Silver: Sterling silver covered with a layer of ruthenium, a mineral that gives strength and shine.) Production technique: Microfusion. Certificate of guarantee: 925 sterling silver. TOUS ensures that jewelry retains its specific shine forever. That’s why we offer free cleaning and maintenance service in all our jewelry.