Buyers from the United States, the Middle East, Russia and Asia mingled with mainly Italian brands such as Roberto Coin, Scavia and Mattia Cielo, as well as two non-Italian jewellers, Rodney Rayner and Hulchi Belluni, as fashion models showed off their jewels amid tight security.
About J is a once-a-year event aimed at local, up-market Italian retail buyers.
Exhibitors talked of strong buying enquiries despite worries over the global economic outlook.
"We had lots of interest from American buyers. It's been very busy," UK-based Rayner said.
Massimiliano Soffiato, sales development manager with Milan-based Scavia, said jewellers were grappling with various economic challenges this year, such as soaring and volatile precious metals prices, and the weak euro, which benefited Italian export prospects but made purchases of diamonds and gold more expensive in dollar terms.
Franco Minonne of Milan-based Bonato said he had seen strong buyer interest at About J and was optimistic about the sales outlook for this year.
Suppliers and retailers gathered in black tie and elegant attire at the splendid villa in the evening to celebrate the occasion over dinner.
About J ran from May 21-23 and immediately preceded CHARM, the second edition of the VicenzaOro jewellery fair which began on May 22 and runs until May 26.