This month’s Hong Kong fair is a magnet for international buyers and exhibitorsNow in its 30th year, the September Hong Kong Jewellery & Gem Fair is attracting an even greater international clientele, thanks to buyers looking for an entrée into the ­rising affluent class in China. This year, designer Etienne Perret will be among the nearly 3,500 exhibitors. Stationed in the Designer Avenue section of the Hong Kong Convention & Exhibition Centre, Camden, Maine–based Perret is bringing ceramic, diamond, and gold styles to the show, scheduled for Sept. 21–25. (The convention center showcases finished jewelry; loose goods, equipment, and packaging are displayed at the AsiaWorld-Expo, located near the airport and open Sept. 19–23.)The only daunting aspect? A 16-hour flight from the States, Perret says. “Hong Kong is an easy and efficient city to get around,” he says