Bisbee is one of the most recognized and desirable of all turquoise. The history of Bisbee may be found in Turquoise in America Part Two, 1910-1990.
 
This cab weighs 6.1 carats and measures 1.5cm X 1cm. It is not treated and lightly backed. It is priced at $20 a carat or $122. I have assigned a TG of 76 or HMG High Mid Grade. I bought the rough from Bruce Mead and cut the cab myself.