This antique, Tiffany art glass bud vase was designed to fit into a bronze base. The bases are more readily available then the glass inserts. This is unsigned, but is certainly by Tiffany Studios. The color of the glass and pattern are seen on many Tiffany pieces in books and museums.
Literature: A. Duncan, Tiffany Lamps and Metalware, p. 369, fig. 1511. M. Eidelberg, N. McClelland, Behind the Scenes of Tiffany Glassmaking, p. 221, ill.