The facility is far more than just another jewelry store: it doubles as a museum. Visitors to the museum learn about the history, techniques and heritage around emeralds and gold. Then ...

are set to appear in “Artists’ Jewelry: From Cubism to Pop, the Diane Venet Collection,” an exhibition scheduled at the Norton Museum of Art in West Palm Beach, Fla., from April 12 to Oct. 5.

The pressure on the museum, combined with the complaint about Porter’s roles, is the latest fallout Christie’s has faced for auctioning the jewelry in May, which came from the estate of a ...