Ross-Simons - Opal Drop Earrings in 14kt Yellow Gold. An RS exclusive. Dream big while wearing jewelry that inspires! A prismatic pair of 8mm round opal cabochons dangle from sunny 14kt yellow gold in these fascinating drop earrings. Hanging length is 7/8". Leverback, opal drop earrings. Opal birthstones are the perfect gift for October birthdays.