Carico Lake is the marketing name for turquoise from the Aurora claim located in the Carico Lake Valley of Lander County Nevada. The history of Carico Lake is found in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 47.4 carats and measures 4cm X 2cm. It is not treated and backed. It is priced at $50 a carat or $2370. I have assigned a TG of 90 or VHG. I bought this stone from Bob Brucia.