Natural Black Onyx Heart Dangle Huggie Hoop Earrings in Sterling Silver, Silver or Gold, Detachable Genuine Black Onyx Heart Charm Hoops Sold as a pair. Dimensions : Hoops measure 8mm inner diameter. Materials and Care: These are made of sterling silver with the option of 18ct gold coating. Only precious metals are used and they are hypoallergenic. They are tarnish resistant but please keep in a sealed plastic bag when not wearing. Stamp: 925 SRS ( our brand initials for Silver Rain Silver). Packaging: All our jewellery comes with our branded velvet bag so your item is ready to be gifted. Production Method: Small Batch lost wax casting. More details about our production method https://www.silverrainsilver.com/blogs/production-methods/production-method-1-lost-wax-casting Instagram: silver_rain_uk