Baselworld has always been a magnet for the world’s leading luxury players, and this year was no different. The Swiss watch and jewelry fair, held March 27 to April 3 at the redesigned Basel Exhibition Center, saw plenty of activity at the high end.For one thing, retailers are reportedly in the market for more unusual, rare colored stones such as paraiba tourmaline. “Stores are definitely understanding paraiba—and are asking for it,” says Divyanshu Navlakha, co-owner of Sutra, based in Houston. “We’re also selling $30,000-and-up pieces now more than ever.”In general, exhibitors r