Inspired by the rough-hewn organic structures of sea-tumbled reefs, these polished, lobe-hugging hoops add everyday elegance to any ensemble. Exclusive US retailer 3/4" diameter Post back Sterling silver or sterling silver with 18k-gold plate Imported Recipient of the Butterfly Mark certification, which identifies luxury brands that adhere to social and environmental best practices This product meets Nordstrom Sustainably Sourced Materials criteria: contains at least 30% sustainably sourced materials"