...in the little town of Cerrillos. "The earliest ceramic evidence at the Cerrillos turquoise mines dates to around 1000 A.D. ... By the end of the 19th Century, it was more economical to purchase turquoise from traders than to mine it at Los Cerrillos."
For more info, go to http://www.cerrilloshills.org/mines/turq04.htm.
