A sapphire, cultured pearl and diamond choker necklace, 20th century

Designed as a three-strand necklace terminating in an 18 carat yellow and white gold cluster, centred by a natural blue sapphire measuring approx. 12.20 x 9.77 x 6.20 mm, in diamond surmount. Estimated sapphire weight 5.90 ct Gross weight approx. 64.