Icon Designs for Android and iPhone by Román Jusdado
iPhone App Icon Sketches — Stage 1
iPhone App Icon Sketches.
The ability to really determine which material is attempted to be simulated here really speaks to the artistic prowess and understanding the designers have for objects and how they interact with light.
45 Fresh Examples Of iOS App Icon Designs http://graphicdesignjunction.com/2013/05/ios-app-icon-mobile-icons-designs/