18k Yellow Gold over Sterling Silver Created Opal and Diamond Accent Drop Earrings AND Pendant Jewelry Set, 18" Necklace: 18" L; Pendant: 0.97" L x 0.41" W; Earring: 1" L x 0.36" W All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Opal is October's birthstone. Trillion shaped center stones Imported