Factual error: Joan ends up taking the "wrong bus," which takes her "hell and gone from Cartagena." Its destination is labeled as "Castillo de San Felipe." However, in Colombia, Castillo de San Felipe is located inside the city of Cartagena itself.
Factual error: None of the "Colombians" speaks with a Colombian accent or uses Colombian slang.
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.