They exported salt from the southern end of the island and lead from the mines of Sant Carles, and at the same time extracted a purple dye from shellfish which was used for imperial cloaks.
They never exported anything from anywhere, especially not the mines of Sant Carles.
mnli hypothesis: They never exported anything from anywhere, especially not the mines of Sant Carles. premise: They exported salt from the southern end of the island and lead from the mines of Sant Carles, and at the same time extracted a purple dye from shellfish which was used for imperial cloaks.