sentences:  Within Alexander County is the unincorporated town of Hiddenite, the location of a mine that yields emeralds, sapphires, and its namesake stone "hiddenite," a variety of spodumene.The county is served by US Highway 64, a controlled-access roadway connecting Taylorsville with Lenoir and Statesville.NC Highways 90, 16, and 127 also serve the county.