14kt yellow gold, aquamarine necklace for women. 45.00 ct. t.w. aquamarine. 3/16" wide. Magnetic clasp provides easy-to-use security. Rondelle shape blue aquamarine. Polished 14kt yellow gold. Due to the naturally occurring characteristics of gemstones, each is unique and may exhibit imperfections such as inclusions , blemishes and cloudiness, as well as color variations.