Korea IT News reports that the new iPhone will feature a "liquidmetal" chassis. This simply refers to "the commercial name for an alloy of titanium, zirconium, nickel, copper and other metals." It will make its surface "smooth like liquid". Click here to view the first image in this gallery. Continue reading to see another interesting iPhone concept.
Liquidmetal was discovered at the California Institute of Technology in 1992. It's a class of patented amorphous metal alloys (basically metallic glass) with unique properties including high strength, high wear resistance against scratching and denting, and a good strength-to-weight ratio. Apple was granted rights to use it in August of 2010.
[Sources 1 | 2]