The largest Spruce Pine mine ... mica and feldspar from the Mitchell County sites, yet, in the past 30 years, escalating demand for newer technologies has made high-purity quartz one of North ...

Elevated levels of lithium, rubidium and cesium have been detected in waters associated with the historic Kings Mountain Mine, west of Charlotte, North Carolina, raising questions about the ...

Flooding in North Carolina has imperiled the operations of mines that produce the world’s purest quartz sand — an irreplaceable ingredient for manufacturing components at the heart of ...