Ming Dynasty wucai (5 enamels) jar sells for 27.4 million USD:
These jars are fired several times, first a layer of qinghua cobalt blue patterns, then a coating of glaze and after that, another layer of colors, including yellow, red and green.
sold by Christies in Hong Kong: http://www.christies.com/lotfinder/Lot/a-highly-important-and-extremely-rare-wucai-6110618-details.aspx