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 20.2 carat and measures 2.5cm X 2cm. It is priced at $20 a carat or $404. It is not treated and is backed. I have assigned a TG of 80 HMG. This comes from the Callais Collection.