Lot 79. An important natural pearl. The baroque drop-shaped natural pearl weighing 239.7 grains (59.92 carats) to the circular-cut diamond foliate surmount and spectacle-set diamond chain, 42.0 cm long, with fitted case and book 'H. Bari and D.Lam, 'Pearls'. Estimate 180,000 - 250,000 U.S. dollars