Goldtone Finish Silver Multi-Colored Opal and Diamond-Accent Heart Pendant Necklace, 18" Single cut: Diamonds consist of fewer than 17 facets Gemstones may have been treated to improve their appearance or durability and may require special care. This piece contains naturl diamond and created opal. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Imported