Continuity mistake: When Zolo stops Ralph's car he shows him a police ID. The way he holds up the ID differs completely, depending on the camera angle. (00:26:10)
Continuity mistake: When Elaine gets knocked out with the ball her hat falls to the ground, next to her car. When the boy drives off the hat is gone. (00:12:55)
Continuity mistake: The piece of wood Zolo grabs as a weapon changes shape between shots. When he threatens Joan with it, seen from behind the end is quite even, but when seen from the front (and when he picks it up at first) it is pointy.
Answer: Any emerald over 1 carat in that beautiful cut and condition would probably go for over 250 million. Real emeralds over 5 carats are rare and the price goes up exponentially after 2 or 3 carats. 305,000 per carat after 5. So yeah that one was probably like 800 or more carats.