Identify the indirect object.
Answer: The indirect object of the verb "vender" is "las turistas"
The verb "vender" is a transitive verb, then it has a direct object, that is "joyas" and it has an indirect object, that is "turistas".
They sell jewelry. (that they sell is the direct object)
those who buy is the indirect object)
The Mapuches sell lapislazuli jewelry to tourists.