The setting is plated with 18K white gold. It has a bright, beautiful Mexican Fire Opal 12ct. 11 Round shape White Swarovski Stones each measured 0.5ct. That is total 17.5ct for this setting. Amazing clarity and shimmering facets. The whole setting of pendant measured 35mm x 35mm The necklace is in regular 18 inches long 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.