The setting is plated with 18K white gold which falls under strict government guidelines. It is hypo-allergenic and will not tarnish or wear off with normal use like with electroplating over a base metal used in costume jewelry. It has 2 bright, beautiful Round cut Mexican Fire Opal 2ct, each earring measured 1ct. 8 white Swarovski Stones each measures as 0.2ct. Amazing clarity and shimmering facets. The item is plated with 18K white gold, it will not tarnish or wear off with normal use. The whole setting of stud earrings each measured 4mm x 12mm The item is Brand New! The stones are held in prong setting for added security. The stones are from Austria and are considered as some of the best in the world . The items also comes with a fancy gift box. It is absolutely gorgeous gift for you or anyone.