Morenci HG from the Callais Collection
 
Morenci is a well known turquoise that came from the Phelps Dodge copper mine in Arizona. The story is told in Turquoise in America Part Two, 1910-1990
 
This cabochon weight 11.6 carats and measures 1.75cm X 1.5cm. It is not treated and backed. The price is $40 a carat or $464. I have assigned a TG of 82 or HG. I purchased this stone from Brown”s Trading.