This antique, art glass shade has heart-shaped leaf and vine decoration with a gilt interior. Iris was the trade name for art glass made at the Fostoria Specialty Company. MAKER Fostoria Glass Specialty Company (Fostoria, OH, 1899-1914) MARKS Unsigned. LITERATURE A.C. Revi, American Art Nouveau Glass, p. 213-19. DATE c. 1910 DIMENSIONS Width 5 Depth 5 Height 5.5 in. Fitter: Width 2.25 in.