Sign Akoya Pearls with 750=18K Gold Clasp, 5.9-6.1mm high luster pearls Knotted pearl Necklace &750(18K) gold Earrings. Pearls are 100% cultured Akoya pearls, the luster is very high shine, high quality expected from Akoya mollusks. The pearls are matching to the 1 mm in diameter (perfect). The stud earrings are marked 750 made from the same Akoya pearls. Very beautiful set from the past of perfectly matched Akoya cultured pearls fine jewelry.