Haifukiho, or the ash-blowing method, was a method of producing this good in Joseon Korea. Yamabuki Castle was said to protect one site for production of this commodity, Iwami Ginzan. (-5[1])Over time, Huancavelica displaced Almaden as the main supplier of one product needed to process this commodity. Quantities of this commodity from (*) Acapulco were exchanged for Chinese silk and porcelain in the Manila Galleon system. (10[1])Sixty percent of the world’s supply of this commodity was (10[1])once produced in the Bolivian town of Potosi, (-5[1])and this commodity was the primary material used to make pieces of eight. For (10[1])10 points, medals of what material are given out to second-place finishers (10[1])at the Olympics? ■END■