Circa 1980s, 18k, American. This striking strand of natural cultured South Sea pearls is a classic. The superior quality black pearls are lustrous, with a shimmering play of color, and at 16 inches long, they are the perfect wearable length. 18k white gold rondels set with 10.0 carats of brilliant white diamonds (G color, VS clarity) add flair and finish. The pearls vary from 12.4 millimeters to 14.6 millimeters in diameter. Excellent condition.