An apotheosis of natural stones colours, Opus Motus is a collection of circular and dynamic marble inlays which can be activated manually by the public with a simple lever-mechanism. The various colours of the marble tesserae, which were selected with the same attention and care of the ancient "stone painters", will come apart through the rotating movement providing new and impressive shapes and colours to the observer.
http://www.lithosdesign.com/en/news_articolo.aspx?id=433
