Sennheiser is already famous for their line of luxury earphones and headphones, but CrystalRoc decided to up the ante by giving that brand even more exclusive treatment, adoring these Sennheiser headphones with Swarovski crystals. Take for example, Rihanna's 24 carat gold and Swarovski Crystal Sennheiser microphone which she used at the recent American Music Awards. Each of these CrystalRoc-enhanced offerings is described as a "fully functioning hand-crafted work of art, developed with a technique which has been honed to absolute ...