On Murano, Making Glass for More Than 700 Years Some of Barovier&Toso’s work can be seen in chandeliers for Louis Vuitton stores and Four Seasons hotels. Working glass in the Barovier&Toso furnace.

The necklace is made up of black glass hearts that experts think were meant to imitate jet, a rare gemstone used in mourning jewelry. The artifact “is not just an object, it’s a symbol,” Ray ...