Of interest to gold mining companies and also investors are the ore grades of a project. How many grams of gold are in a ton of rock is one of the most important pieces of information. This is because the gold content plays a decisive role in determining the economic feasibility of a mine. If the ore is higher grade, then more gold can be produced at lower cost. If the ore grade is low, more material has to be processed, i.e., more money has to be spent. Most gold projects contain one to four gr