Paris master jeweler Joel Rosenthal turns his discriminating talent to a fleeting pleasure: perfume. Joel Rosenthal, the ornery genius behind the Paris jewelry house JAR, casts an eye over the inventory in his velvet-lined sanctuary just off the Place Vendome. It goes without saying that Rosenthal likes what he sees--each and every jewel has already met his exacting standards. "These are exceptional, exceptional rubies," he says, as his glance rests briefly on a ring of three pigeon blood--colored stones. Moving along the case, he names each gem in turn to satisfy a visitor's curiosity. "Thi...
