A jeweler for over four decades, Londoner Glenn Spiro has long been the go-to for in-the-know collectors looking for something a little unusual. His G by Glenn Spiro boutiques can be found in many a tony enclave, from his by-appointment atelier in a historic mansion in Mayfair to St. Barts, Saint-Tropez, and a space at the Peninsula Hotel in Beverly Hills, one of his favorite stateside haunts. Having grown up poor in Bethnal Green in East London, Spiro got his entrée into the realm of elite gems at age 15, when he was hired as an apprentice by English Art Works, a jewelry workshop owned by Cartier. By age
