When collectors think of Steuben glass, two distinct styles come to mind. The first was pioneered by Steuben co-founder Frederick Carder in 1903. As Steuben’s chief designer, Carder created a new form of iridescent glass called Aurene. Unlike Tiffany’s dense and dark Favrile line of iridescent glass, which was introduced in 1894, Carder’s Aurene pieces were luminous and lustrous, seeming to radiate more light than they absorbed. So...