One of the handset showcased by Sony Ericsson during CES 2008 is the “Sony Ericsson Z555″. This diamond-themed cell phone features Walkman-like gesture control, allowing users to switch between call and mute simply by flipping it back and forth. Heck, you can even turn-off the alarm by only sweeping your hand over the phone! Also, if you check out the image below, you can see that the phone’s external display blends right into its diamond black cover. Cool!