Three cultured pearl and diamond necklaces

Of identical design, the first strung with 12 cultured pearls measuring approximately 14.0 mm., spaced by collet-set round diamonds and numerous small round diamonds set in rondelles, altogether weighing approximately 6.65 carats, the second composed of 14  cultured pearls measuring approximately 14.0 mm., similarly decorated with numerous round diamonds weighing approximately 7.75 carats, and the third with 17 cultured pearls measuring approximately 14.0 to 15.0 mm., decorated with numerous round diamonds weighing approximately 9.40 carats, all mounted in 18 karat white gold, lengths 17 to 24 inches.