When searching for antique lamp accessories, it is important to inspect every piece available for imperfections. It also usually helpful to have a basic amount of background information on the piece you are seeking. When choosing ribbed glass lamp shades for student style lamps, there are a few essential facts worth knowing as an informed shopper. A ribbed glass lamp shade features vertical ribs that encircle the shade from fitter to neck. These popular student ribbed glass lamp shades come in two distinctive patterns known as straight ribs and rib swirls. Ribbed shades should feature evenly spaced ribs throughout the entire shade as opposed to ribs of varying widths, which may mean it was not crafted with care. When inspecting ribbed glass lamp shades for quality, always closely examine the sizes or widths of the ribs near the joint of the shade, as it is easier to spot imperfections in that area of the shade.