Bright Heart cut Mexican Fire Opal 4.2ct , 22 Round cut White Swarovski crystals all measured 1.5ct. That is total 5.7ct for this setting. 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 pendant measured 20mm width x 18mm length. The necklace is 18 inches long.