Australias gold mines by production, grades and costs
22/05/2019#0183;#32;Scale, grades, processing costs, open pit vs underground . The interesting aspect of the AISC metric is the number of factors that feed into the final figure, and similar to any other sector costs, they can vary from month to month and year to year. In the case of gold stocks, better grades usually translate into lower cost mines. Open cut mines are normally cheaper to operate than underground