Diopside Hoop Earrings, 925 Sterling Silver Diopside Earrings, Diopside Earrings. Natural Diopside Gemstone measures 3mm x 3mm and is set on a prong setting. This item includes a gift box and certificate of authenticity with purchase. These earrings are 100% 925 sterling silver. Available in Rose Gold or Platinum Plated (Silver). Both options are 925 sterling silver and platinum plated. Please allow up to 10-15 days for processing and delivery of this item.