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 18 carat and measures 1.5cm X 1.5cm x 5mm. It is priced at $25 a carat or $450. It is not treated and is backed. I have assigned a TG of 85 or VHG. Hidden Valley is very rare especially at higher grades. This stone was cut by and purchased from Wayne Nelson. White spot is camera flash.