At the top of these shafts , are laterality positioned volutes , beneath rectangular blocks of stone . Dentils are placed along the length of the Ionic cornice . This capital was photographed no longer placed upon its column. Also see capital , Corinthian , and Doric . A surface displaying a lustrous rainbowlike brightness , such as seen on oil slicks, in the plumage of some birds and on the wings of some butterflies.
Opalescence includes iridescence, but upon a base of whiteness.
See Art Nouveau . Organic , water-based inks in four colors are applied to the paper 's surface from tiny jets one tenth the diameter of a human hair. Often used as a general reference to any point or matter of discussion, debate, or dispute. Some issues of great interest in the art world may be eternal, while others come and go from time to time. Examples are described within articles about various cultures , periods , movement , and styles .