The company sells its quartz under the brand name IOTA. Its mines are north of downtown in an area called the Spruce Pine ...
The world’s main producer of high-purity quartz, a mineral crucial to the global supply of semiconductor chips, announced its shuttered Spruce Pine, North Carolina, mines have endured “minor ...
The extreme weather has also forced the closure of quartz mines in Spruce Pine, a tiny town about an hour north-east of Asheville, home to the world’s largest-known source of high-purity quartz.