Monster Products announced late today that it has created a one-of-a-kind “crown jewel” headphone based on its Diamond Tears model as redesigned by Korean artist and jewelry designer Sally Sohn for the exclusive Harrods of London department store. The new headphones feature 5.56 carats of black diamonds and plenty of 18k gold…oh, and it comes with a hefty price tag of £20,000. That’s $30,000 in good old U.S. greenbacks.