18k yellow gold PVD coated on stainless steel with deep sea blue enamel detailing and natural cowrie shell; Waterproof, tarnish proof, and hypoallergenic; Protected with Dorne's proprietary UltraShine ™ technology that coats 18K yellow gold on a stainless steel base; Made in China; Revolve Style No. DRNE-WL4; Manufacturer Style No. DK019