Peridot and pink sapphire bracelet, Paolo Costagli The wide, flexible band set with numerous oval-shaped peridots spaced by round pink sapphires, mounted in 18 karat gold, length 6½ inches, signed Paolo Costagli. Estimate 6,000—8,000 USD Sotheby's. Important...

A morganite and diamond ring, Paolo Costagli centering a pear-shaped morganite, weighing 18.05 carats, pointed off-center, completed by diamond shoulders and a plain mount; unsigned, attributed to Paolo Costagli; mounted in platinum and eighteen karat...