Antonini 18kt yellow gold Atolli medium stud earrings featuring jet inlay and 0.10ctw (average) VS G round brilliant diamonds Atolli collection is simple shapes, made exclusively from polished yellow gold 18kt, white diamonds and jet. Circular elements of various sizes, reminiscent of the typical shape of an atoll: an outline that encompasses a stretch of crystal clear water. Jewels that guard something precious: diamonds. Jet is a black wood stone, historically used in Victorian England as an ornamental stone.