Philippe Coutinho had another outstanding performance for Liverpool in their 2-1 win over Manchester City on Sunday.
Coutinho scored a goal and made several brilliant passes for Liverpool.
"He cost £8.5 million," said Coutinho. "It is frightening to know what he could be worth.
"He is a joy to work with and a joy to watch. He is a kid who has so much ahead of him in the game. He is 22 years of age. People forget he came to us at 19. He is a sensational footballer. To beat Joe Hart at that angle and power was a phenomenal shot. So was Jordan's."
Coutinho recently signed a deal that will keep him at Anfield until 2020 and Rodgers added: "Since he signed his contract he has started to score goals.
"He is a player that has always assisted and made the final pass in his career. He is a very selfless player and a very humble young guy and would rather create for others. But his technique is at a high, high level so he is going to score more goals."