Beautiful Aureen Iridescent Gold-Green-Blue Art Glass Lamp Shade. Iridescent, so color changes depending on angle of light, as shown in photos. In excellent condition, very tiny chipping and one "scrape" (may have been in the manufacturing) on edge of fitter, as seen in photos. Unusual Mission Arts & Crafts shape and style. 5.25" tall, 4.5" diameter at bottom, 2.25" fitter. Unsure if antique or newer production, as I have seen no other like it.