On the Many Variations of Bisbee Turquoise and its Identification – Geochemical Indicators and Comparisons to Kingman Turquoise Neil Ray, West Texas Analytical Laboratory, Geochemist & Mineralogist Bisbee turquoise has always been considered an uncommon turquoise with a rich mining history; the pit was once considered a large-scale copper mine owned by the Phelps Dodge Corporation producing substantial amounts of recoverable copper.  Consequently, turquoise was deemed a waste