Nevada Blue is one of the seven classic turquoise mines of Nevada. It is one of the oldest first located as the Watts Mine in 1903. The history of Nevada Blue is found in Turquoise in America Part Two, 1910-1990.
 
This cab weighs 10.1 carat and measures 1.5cm X 1.5cm X 5mm. It is priced at $40 a carat or $404. It is not treated and is backed. I have assigned a TG of 82 or HG. I bought this stone from Poncho Williams. White spot is camera flash.