A second experiment of crush ing the quartz as well as pulverizing it, was afterwards made 70 lbs. of gold-bearing quartz, from a mine in Rutherford Co., in the same State, being operated upon j ...

We're after pure gold, but rock that contains gold also includes lots of other materials such as quartz, calcite ... back from the 1870s in the area. Crushing the rock Crushing the gold-bearing ...