Kingman is the marketing name for turquoise from Ithaca Peak and Turquoise Mountain outside of Kingman Arizona. The story of Kingman is found in Turquoise in America Parts 1-3.
 
This cab weighs 22.8 carat and measures 2.75cm X 1.5cm. It is priced at $30 a carat or $684. It is not treated and is backed. I have assigned a TG of 86 VHG. This comes from the Callais Collection. White spot is camera flash.