Hidden Valley comes from an unknown mine probably high graded in the Candelaria Hills. The story is found in Turquoise in America Part Two, 1910-1990.
 
This cab weighs 98.7 carat and measures 4cm X 3.75cm. It is priced at $10 a carat or $987. It is not treated and is backed. I have assigned a TG of 77 or HMG. Hidden Valley is very rare especially in this size suitable for a bolo or large cuff. This stone was cut by and purchased from Wayne Nelson. White spot is camera flash.