2019 Panini Mosaic Gold Wave #209 Zion Williamson Rookie PSA GEM MINT 10. Popular Panini issue, premium Gold Wave insert, a rookie card of perhaps the most promising young player in the sport, and grade it all a perfect GEM MT 10 and you have this magnificent Zion Williamson issue. These cards only promise to become more difficult to find over the years, so grab this one while you can.