Expert jeweler Greg Yuna appeared on GQ's On The Rocks series. Yuna walks us through some of his pieces and explains in detail the value behind the stones. He tells us about the first piece he worked on, which was a Jewish piece. Yuna has created pieces for Shy Glizzy, Lil Yachty, and many others. Yuna says, "When I go down on the bus, I only use vvs."