Lander blue is an iconic turquoise mine located in Lander County Nevada. The story of Lander Blue is found in Turquoise in America Part Two, 1910-1990.
 
This cabochon weighs 10.5 carats and measures 2cm X 1.5cm X 5mm. It is not treated and is backed. It is priced at $400/ct or $4,200. I have assigned a TG of 91 or GG. I purchased this stone in 2015 with Bob Brucia in a squash blossom necklace.