Darling Darlene is a turquoise mine of very small production from Lander County Nevada. The history of Darling Darlene is told in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 20 carats and measures 2.5cm X 2.5cm. It is priced at $50 a carat or $1000. It is not treated and backed. I have assigned a TG of 91 or GG. Darling Darlene is very rare especially at this grade. I purchased this stone from Eric Rundquist.