Dorne

Kingdom
Dorne is the south-most kingdom, among the four original southern kingdoms, and has been consistently the richest kingdom in raw materials since the first summer. Specifically, the Dornish mining industry of metal and obsidian has allowed them to create record holding stockpiles of raw material, and thus create one of the most consistently powerful economies in Westeros.

The Dornish also have been able to produce a remarkably good red wine, which has remained universally praised.